125988990 has 16 divisors (see below), whose sum is σ = 302373648. Its totient is φ = 33597056.

The previous prime is 125988977. The next prime is 125989001. The reversal of 125988990 is 99889521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2099787 + ... + 2099846.

It is an arithmetic number, because the mean of its divisors is an integer number (18898353).

Almost surely, 2^125988990 is an apocalyptic number.

125988990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125988990 is an abundant number, since it is smaller than the sum of its proper divisors (176384658).

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

125988990 is a wasteful number, since it uses less digits than its factorization.

125988990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199643.

The product of its (nonzero) digits is 466560, while the sum is 51.

The square root of 125988990 is about 11224.4817252290. The cubic root of 125988990 is about 501.3151908462.

The spelling of 125988990 in words is "one hundred twenty-five million, nine hundred eighty-eight thousand, nine hundred ninety".