125791566 has 16 divisors (see below), whose sum is σ = 251731584. Its totient is φ = 41905784.

The previous prime is 125791537. The next prime is 125791579. The reversal of 125791566 is 665197521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6991 + ... + 17333.

It is an arithmetic number, because the mean of its divisors is an integer number (15733224).

Almost surely, 2^125791566 is an apocalyptic number.

125791566 is an abundant number, since it is smaller than the sum of its proper divisors (125940018).

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

125791566 is a wasteful number, since it uses less digits than its factorization.

125791566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12375.

The product of its digits is 113400, while the sum is 42.

The square root of 125791566 is about 11215.6839292127. The cubic root of 125791566 is about 501.0532013097.

The spelling of 125791566 in words is "one hundred twenty-five million, seven hundred ninety-one thousand, five hundred sixty-six".