125872551 has 24 divisors (see below), whose sum is σ = 209008800. Its totient is φ = 71505216.

The previous prime is 125872519. The next prime is 125872561. The reversal of 125872551 is 155278521.

125872551 is a `hidden beast` number, since 1 + 2 + 587 + 25 + 51 = 666.

It is not a de Polignac number, because 125872551 - 2⁵ = 125872519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125872561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5125 + ... + 16673.

It is an arithmetic number, because the mean of its divisors is an integer number (8708700).

Almost surely, 2^125872551 is an apocalyptic number.

125872551 is a deficient number, since it is larger than the sum of its proper divisors (83136249).

125872551 is a wasteful number, since it uses less digits than its factorization.

125872551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11735 (or 11732 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 125872551 is about 11219.2936943464. The cubic root of 125872551 is about 501.1607047772.

The spelling of 125872551 in words is "one hundred twenty-five million, eight hundred seventy-two thousand, five hundred fifty-one".