125865570 has 64 divisors (see below), whose sum is σ = 310337280. Its totient is φ = 32659200.

The previous prime is 125865563. The next prime is 125865581. The reversal of 125865570 is 75568521.

It is a super-2 number, since 2×125865570² = 31684283422849800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199155 + ... + 199785.

It is an arithmetic number, because the mean of its divisors is an integer number (4849020).

Almost surely, 2^125865570 is an apocalyptic number.

125865570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125865570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155168640).

125865570 is an abundant number, since it is smaller than the sum of its proper divisors (184471710).

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

125865570 is a wasteful number, since it uses less digits than its factorization.

125865570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 125865570 is about 11218.9825741909. The cubic root of 125865570 is about 501.1514396712.

The spelling of 125865570 in words is "one hundred twenty-five million, eight hundred sixty-five thousand, five hundred seventy".