125870397137 has 4 divisors (see below), whose sum is σ = 126079832676. Its totient is φ = 125660961600.

The previous prime is 125870397127. The next prime is 125870397203. The reversal of 125870397137 is 731793078521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731793078521 = 2917 ⋅250871813.

It can be written as a sum of positive squares in 2 ways, for example, as 47743998016 + 78126399121 = 218504^2 + 279511^2 .

It is a cyclic number.

It is not a de Polignac number, because 125870397137 - 2⁶ = 125870397073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125870397127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104716868 + ... + 104718069.

It is an arithmetic number, because the mean of its divisors is an integer number (31519958169).

Almost surely, 2^125870397137 is an apocalyptic number.

It is an amenable number.

125870397137 is a deficient number, since it is larger than the sum of its proper divisors (209435539).

125870397137 is an equidigital number, since it uses as much as digits as its factorization.

125870397137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209435538.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 125870397137 in words is "one hundred twenty-five billion, eight hundred seventy million, three hundred ninety-seven thousand, one hundred thirty-seven".