138149

138149 is a natural number that follows 138148 and precedes 138150. It is an odd number and is not divisible by 2. In terms of its prime factorization, 138149 can be expressed as the product of 13 and 10627, where 13 is a prime number and 10627 is a composite number.

138149 is also a semiprime number, which means it is the product of exactly two prime numbers. In this case, those primes are 13 and 10627. Semiprime numbers have applications in various fields, including cryptography, where they are used in the RSA encryption algorithm.

Additionally, 138149 is a deficient number. A deficient number is a number where the sum of its proper divisors is less than the number itself. The proper divisors of 138149 are 1, 13, 10627, and 138149. The sum of these divisors is 1 + 13 + 10627 + 138149 = 148790, which is greater than 138149. However, when considering only the proper divisors excluding the number itself, the sum is 1 + 13 + 10627 = 10641, which is less than 138149, making it a deficient number.

In the decimal system, 138149 is a six-digit number. It is not a palindromic number, meaning it does not read the same backward as forward. It is also not an automorphic number, which is a number whose square ends with the same digits as the number itself.