125721792 has 84 divisors (see below), whose sum is σ = 411851856. Its totient is φ = 35919360.

The previous prime is 125721787. The next prime is 125721811. The reversal of 125721792 is 297127521.

125721792 is a `hidden beast` number, since 12 + 572 + 1 + 79 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11559 + ... + 19622.

Almost surely, 2^125721792 is an apocalyptic number.

125721792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125721792 is an abundant number, since it is smaller than the sum of its proper divisors (286130064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125721792 is a wasteful number, since it uses less digits than its factorization.

125721792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31206 (or 31193 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 125721792 is about 11212.5729429065. The cubic root of 125721792 is about 500.9605428665.

The spelling of 125721792 in words is "one hundred twenty-five million, seven hundred twenty-one thousand, seven hundred ninety-two".