125815564 has 12 divisors (see below), whose sum is σ = 251631184. Its totient is φ = 53920944.

The previous prime is 125815541. The next prime is 125815597. The reversal of 125815564 is 465518521.

125815564 is an admirable number.

It is a super-2 number, since 2×125815564² = 31659112289276192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2246679 + ... + 2246734.

Almost surely, 2^125815564 is an apocalyptic number.

125815564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

125815564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

125815564 is a wasteful number, since it uses less digits than its factorization.

125815564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493424 (or 4493422 counting only the distinct ones).

The product of its digits is 48000, while the sum is 37.

The square root of 125815564 is about 11216.7537193254. The cubic root of 125815564 is about 501.0850622432.

It can be divided in two parts, 12581 and 5564, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 125815564 in words is "one hundred twenty-five million, eight hundred fifteen thousand, five hundred sixty-four".