125537913 has 6 divisors (see below), whose sum is σ = 181332554. Its totient is φ = 83691936.

The previous prime is 125537903. The next prime is 125537917. The reversal of 125537913 is 319735521.

125537913 is a `hidden beast` number, since 12 + 553 + 7 + 91 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 72131049 + 53406864 = 8493^2 + 7308^2 .

It is not a de Polignac number, because 125537913 - 2¹⁰ = 125536889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125537917) 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, 6974320 + ... + 6974337.

Almost surely, 2^125537913 is an apocalyptic number.

It is an amenable number.

125537913 is a deficient number, since it is larger than the sum of its proper divisors (55794641).

125537913 is a wasteful number, since it uses less digits than its factorization.

125537913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13948663 (or 13948660 counting only the distinct ones).

The product of its digits is 28350, while the sum is 36.

The square root of 125537913 is about 11204.3702634285. The cubic root of 125537913 is about 500.7161909845.

The spelling of 125537913 in words is "one hundred twenty-five million, five hundred thirty-seven thousand, nine hundred thirteen".