125643972 has 24 divisors (see below), whose sum is σ = 299408256. Its totient is φ = 40990048.

The previous prime is 125643949. The next prime is 125643977. The reversal of 125643972 is 279346521.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 125643972.

It is not an unprimeable number, because it can be changed into a prime (125643977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110823 + ... + 111950.

It is an arithmetic number, because the mean of its divisors is an integer number (12475344).

Almost surely, 2^125643972 is an apocalyptic number.

125643972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125643972 is an abundant number, since it is smaller than the sum of its proper divisors (173764284).

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

125643972 is a wasteful number, since it uses less digits than its factorization.

125643972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222827 (or 222825 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 125643972 is about 11209.1021941991. The cubic root of 125643972 is about 500.8571590504.

The spelling of 125643972 in words is "one hundred twenty-five million, six hundred forty-three thousand, nine hundred seventy-two".