125591049 has 6 divisors (see below), whose sum is σ = 181409306. Its totient is φ = 83727360.

The previous prime is 125591033. The next prime is 125591069. The reversal of 125591049 is 940195521.

125591049 is a `hidden beast` number, since 1 + 25 + 591 + 0 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100641024 + 24950025 = 10032^2 + 4995^2 .

It is not a de Polignac number, because 125591049 - 2⁴ = 125591033 is a prime.

It is a super-2 number, since 2×125591049² = 31546223177840802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125591069) 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, 6977272 + ... + 6977289.

Almost surely, 2^125591049 is an apocalyptic number.

It is an amenable number.

125591049 is a deficient number, since it is larger than the sum of its proper divisors (55818257).

125591049 is a wasteful number, since it uses less digits than its factorization.

125591049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13954567 (or 13954564 counting only the distinct ones).

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

The square root of 125591049 is about 11206.7412301703. The cubic root of 125591049 is about 500.7868264920.

The spelling of 125591049 in words is "one hundred twenty-five million, five hundred ninety-one thousand, forty-nine".