149999

149,999 is a natural number that lies between 149,998 and 150,000. It is one less than 150,000, a highly composite number, and it is odd.

Mathematical properties of 149,999 include its prime factorization: 149,999 = 61 × 2,459. The factor 2,459 is a prime number, which makes 149,999 a semiprime (a product of exactly two primes). This factorization shows that 149,999 is not a prime and has exactly two prime factors counting multiplicity.

In terms of other representations, 149,999 in hexadecimal is 0x249EF. In binary, it requires 18 bits and falls between 2^17 and 2^18. It can also be described as 150,000 − 1, using the prime factorization of 150,000 as a reference point (2^4 × 3 × 5^5).

Context and usage of the number: 149,999 is primarily of interest in number theory as a concrete semiprime with relatively small factors. Because its factorization is known, it is sometimes used as a test case in algorithms for primality testing, integer factorization, and related computational problems. It does not have widely noted historical, scientific, or cultural significance beyond its mathematical properties.