125991567 has 24 divisors (see below), whose sum is σ = 196580384. Its totient is φ = 77298624.

The previous prime is 125991563. The next prime is 125991571. The reversal of 125991567 is 765199521.

125991567 is a `hidden beast` number, since 1 + 2 + 599 + 1 + 56 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (125991563) and next prime (125991571).

It is not a de Polignac number, because 125991567 - 2² = 125991563 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125991563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42198 + ... + 45084.

Almost surely, 2^125991567 is an apocalyptic number.

125991567 is a deficient number, since it is larger than the sum of its proper divisors (70588817).

125991567 is a wasteful number, since it uses less digits than its factorization.

125991567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3276 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The square root of 125991567 is about 11224.5965183609. The cubic root of 125991567 is about 501.3186088180.

The spelling of 125991567 in words is "one hundred twenty-five million, nine hundred ninety-one thousand, five hundred sixty-seven".