125861235137 has 24 divisors (see below), whose sum is σ = 138902673000. Its totient is φ = 113957648640.

The previous prime is 125861235121. The next prime is 125861235161. The reversal of 125861235137 is 731532168521.

It can be written as a sum of positive squares in 4 ways, for example, as 5829475201 + 120031759936 = 76351^2 + 346456^2 .

It is not a de Polignac number, because 125861235137 - 2⁴ = 125861235121 is a prime.

It is a super-2 number, since 2×125861235137² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125861235337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41277989 + ... + 41281037.

It is an arithmetic number, because the mean of its divisors is an integer number (5787611375).

Almost surely, 2^125861235137 is an apocalyptic number.

It is an amenable number.

125861235137 is a deficient number, since it is larger than the sum of its proper divisors (13041437863).

125861235137 is a wasteful number, since it uses less digits than its factorization.

125861235137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337 (or 4326 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The spelling of 125861235137 in words is "one hundred twenty-five billion, eight hundred sixty-one million, two hundred thirty-five thousand, one hundred thirty-seven".