137285725 has 24 divisors (see below), whose sum is σ = 175969640. Its totient is φ = 106168320.

The previous prime is 137285723. The next prime is 137285767. The reversal of 137285725 is 527582731.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 31236921 + 106048804 = 5589^2 + 10298^2 .

It is not a de Polignac number, because 137285725 - 2¹ = 137285723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137285723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178141 + ... + 178909.

Almost surely, 2^137285725 is an apocalyptic number.

It is an amenable number.

137285725 is a deficient number, since it is larger than the sum of its proper divisors (38683915).

137285725 is a wasteful number, since it uses less digits than its factorization.

137285725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1004 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 137285725 is about 11716.8991205011. The cubic root of 137285725 is about 515.8718070368.

The spelling of 137285725 in words is "one hundred thirty-seven million, two hundred eighty-five thousand, seven hundred twenty-five".