135145

135145 is a natural number, written with decimal notation as 135,145. Its prime factorization is 5 × 151 × 179, which makes it a product of three distinct primes. Because the prime factors are all distinct, 135145 is squarefree and has eight positive divisors: 1, 5, 151, 179, 755 (5×151), 895 (5×179), 27029 (151×179), and 135145 itself.

As a result of its factorization, 135145 is odd and not prime. It ends with the digit 5, so it is divisible by 5 (135145 ÷ 5 = 27029). The number is congruent to 1 modulo 4 (135145 ≡ 1 mod 4) and its digit sum is 19, which is not divisible by 3, indicating it is not divisible by 3 or 9.

135145 cannot be expressed as a sum of two squares. This follows from the sum-of-two-squares theorem: the primes 151 and 179 are each congruent to 3 mod 4 and appear with odd exponent in the factorization, which prevents such a representation.

The totient of 135145 is φ(135145) = (5−1)(151−1)(179−1) = 4 × 150 × 178 = 106,800. In number theory terms, 135145 is a 3-almost-prime (the product of three distinct primes) and, being squarefree, has exactly eight divisors.