125199972 has 24 divisors (see below), whose sum is σ = 324592800. Its totient is φ = 41733288.

The previous prime is 125199959. The next prime is 125199973. The reversal of 125199972 is 279991521.

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

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (125199973) 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, 579522 + ... + 579737.

It is an arithmetic number, because the mean of its divisors is an integer number (13524700).

Almost surely, 2^125199972 is an apocalyptic number.

125199972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125199972 is an abundant number, since it is smaller than the sum of its proper divisors (199392828).

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

125199972 is a wasteful number, since it uses less digits than its factorization.

125199972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159272 (or 1159264 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 125199972 is about 11189.2793333619. The cubic root of 125199972 is about 500.2664872772.

The spelling of 125199972 in words is "one hundred twenty-five million, one hundred ninety-nine thousand, nine hundred seventy-two".