137499025 has 6 divisors (see below), whose sum is σ = 170498822. Its totient is φ = 109999200.

The previous prime is 137499023. The next prime is 137499049. The reversal of 137499025 is 520994731.

It can be written as a sum of positive squares in 3 ways, for example, as 45319824 + 92179201 = 6732^2 + 9601^2 .

It is not a de Polignac number, because 137499025 - 2¹ = 137499023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137499023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2749956 + ... + 2750005.

Almost surely, 2^137499025 is an apocalyptic number.

It is an amenable number.

137499025 is a deficient number, since it is larger than the sum of its proper divisors (32999797).

137499025 is an equidigital number, since it uses as much as digits as its factorization.

137499025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499971 (or 5499966 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 137499025 is about 11725.9978253452. The cubic root of 137499025 is about 516.1388377579.

The spelling of 137499025 in words is "one hundred thirty-seven million, four hundred ninety-nine thousand, twenty-five".