125221872 has 40 divisors (see below), whose sum is σ = 331385040. Its totient is φ = 40721920.

The previous prime is 125221871. The next prime is 125221883. The reversal of 125221872 is 278122521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125221871) 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, 29847 + ... + 33782.

It is an arithmetic number, because the mean of its divisors is an integer number (8284626).

Almost surely, 2^125221872 is an apocalyptic number.

125221872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125221872 is an abundant number, since it is smaller than the sum of its proper divisors (206163168).

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

125221872 is a wasteful number, since it uses less digits than its factorization.

125221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63681 (or 63675 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 125221872 is about 11190.2579058751. The cubic root of 125221872 is about 500.2956544757.

The spelling of 125221872 in words is "one hundred twenty-five million, two hundred twenty-one thousand, eight hundred seventy-two".