125604981 has 6 divisors (see below), whose sum is σ = 181429430. Its totient is φ = 83736648.

The previous prime is 125604961. The next prime is 125604989. The reversal of 125604981 is 189406521.

125604981 is a `hidden beast` number, since 1 + 2 + 560 + 4 + 98 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118069956 + 7535025 = 10866^2 + 2745^2 .

It is not a de Polignac number, because 125604981 - 2⁵ = 125604949 is a prime.

It is a super-2 number, since 2×125604981² = 31553222504020722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125604989) 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, 6978046 + ... + 6978063.

Almost surely, 2^125604981 is an apocalyptic number.

It is an amenable number.

125604981 is a deficient number, since it is larger than the sum of its proper divisors (55824449).

125604981 is a wasteful number, since it uses less digits than its factorization.

125604981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956115 (or 13956112 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 125604981 is about 11207.3628030862. The cubic root of 125604981 is about 500.8053434807.

The spelling of 125604981 in words is "one hundred twenty-five million, six hundred four thousand, nine hundred eighty-one".