125881556 has 12 divisors (see below), whose sum is σ = 222564468. Its totient is φ = 62291712.

The previous prime is 125881499. The next prime is 125881573. The reversal of 125881556 is 655188521.

It can be written as a sum of positive squares in 2 ways, for example, as 100681156 + 25200400 = 10034^2 + 5020^2 .

It is a super-2 number, since 2×125881556² = 31692332281962272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161831 + ... + 162606.

It is an arithmetic number, because the mean of its divisors is an integer number (18547039).

Almost surely, 2^125881556 is an apocalyptic number.

It is an amenable number.

125881556 is a deficient number, since it is larger than the sum of its proper divisors (96682912).

125881556 is a wasteful number, since it uses less digits than its factorization.

125881556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324538 (or 324536 counting only the distinct ones).

The product of its digits is 96000, while the sum is 41.

The square root of 125881556 is about 11219.6950047673. The cubic root of 125881556 is about 501.1726556076.

The spelling of 125881556 in words is "one hundred twenty-five million, eight hundred eighty-one thousand, five hundred fifty-six".