125993556 has 144 divisors (see below), whose sum is σ = 363854400. Its totient is φ = 38110176.

The previous prime is 125993521. The next prime is 125993587. The reversal of 125993556 is 655399521.

125993556 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 93 + 556 = 666.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2135455 + ... + 2135513.

Almost surely, 2^125993556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125993556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181927200).

125993556 is an abundant number, since it is smaller than the sum of its proper divisors (237860844).

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

125993556 is an equidigital number, since it uses as much as digits as its factorization.

125993556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 77 counting only the distinct ones).

The product of its digits is 364500, while the sum is 45.

The square root of 125993556 is about 11224.6851180779. The cubic root of 125993556 is about 501.3212468714.

The spelling of 125993556 in words is "one hundred twenty-five million, nine hundred ninety-three thousand, five hundred fifty-six".