125899984 has 20 divisors (see below), whose sum is σ = 278778784. Its totient is φ = 53957088.

The previous prime is 125899979. The next prime is 125899987. The reversal of 125899984 is 489998521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125899987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561942 + ... + 562165.

Almost surely, 2^125899984 is an apocalyptic number.

125899984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

125899984 is an abundant number, since it is smaller than the sum of its proper divisors (152878800).

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

125899984 is a wasteful number, since it uses less digits than its factorization.

125899984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124122 (or 1124116 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 55.

The square root of 125899984 is about 11220.5162091590. The cubic root of 125899984 is about 501.1971102334.

The spelling of 125899984 in words is "one hundred twenty-five million, eight hundred ninety-nine thousand, nine hundred eighty-four".