125764565 has 8 divisors (see below), whose sum is σ = 152613720. Its totient is φ = 99480832.

The previous prime is 125764543. The next prime is 125764607. The reversal of 125764565 is 565467521.

It can be written as a sum of positive squares in 4 ways, for example, as 1909924 + 123854641 = 1382^2 + 11129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125764565 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 140864 + ... + 141753.

It is an arithmetic number, because the mean of its divisors is an integer number (19076715).

Almost surely, 2^125764565 is an apocalyptic number.

It is an amenable number.

125764565 is a deficient number, since it is larger than the sum of its proper divisors (26849155).

125764565 is an equidigital number, since it uses as much as digits as its factorization.

125764565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282711.

The product of its digits is 252000, while the sum is 41.

The square root of 125764565 is about 11214.4801484509. The cubic root of 125764565 is about 501.0173485997.

The spelling of 125764565 in words is "one hundred twenty-five million, seven hundred sixty-four thousand, five hundred sixty-five".