125021988 has 96 divisors (see below), whose sum is σ = 398961920. Its totient is φ = 32970240.

The previous prime is 125021909. The next prime is 125021999. The reversal of 125021988 is 889120521.

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 31 ways as a sum of consecutive naturals, for example, 3468 + ... + 16188.

Almost surely, 2^125021988 is an apocalyptic number.

125021988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125021988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199480960).

125021988 is an abundant number, since it is smaller than the sum of its proper divisors (273939932).

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

125021988 is a wasteful number, since it uses less digits than its factorization.

125021988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754 (or 12746 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 125021988 is about 11181.3231775135. The cubic root of 125021988 is about 500.0293156145.

The spelling of 125021988 in words is "one hundred twenty-five million, twenty-one thousand, nine hundred eighty-eight".