125945019 has 6 divisors (see below), whose sum is σ = 181920596. Its totient is φ = 83963340.

The previous prime is 125945009. The next prime is 125945021. The reversal of 125945019 is 910549521.

125945019 is a `hidden beast` number, since 1 + 2 + 594 + 50 + 19 = 666.

It is not a de Polignac number, because 125945019 - 2²⁵ = 92390587 is a prime.

It is a super-2 number, since 2×125945019² = 31724295621820722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125945009) 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, 6996937 + ... + 6996954.

Almost surely, 2^125945019 is an apocalyptic number.

125945019 is a deficient number, since it is larger than the sum of its proper divisors (55975577).

125945019 is a wasteful number, since it uses less digits than its factorization.

125945019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993897 (or 13993894 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 125945019 is about 11222.5228447083. The cubic root of 125945019 is about 501.2568632754.

The spelling of 125945019 in words is "one hundred twenty-five million, nine hundred forty-five thousand, nineteen".