125315569 has 4 divisors (see below), whose sum is σ = 130764096. Its totient is φ = 119867044.

The previous prime is 125315543. The next prime is 125315579. The reversal of 125315569 is 965513521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125315569 - 2²³ = 116926961 is a prime.

It is a super-2 number, since 2×125315569² = 31407983667587522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125315539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2724229 + ... + 2724274.

It is an arithmetic number, because the mean of its divisors is an integer number (32691024).

Almost surely, 2^125315569 is an apocalyptic number.

It is an amenable number.

125315569 is a deficient number, since it is larger than the sum of its proper divisors (5448527).

125315569 is an equidigital number, since it uses as much as digits as its factorization.

125315569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448526.

The product of its digits is 40500, while the sum is 37.

The square root of 125315569 is about 11194.4436663909. The cubic root of 125315569 is about 500.4204050867.

The spelling of 125315569 in words is "one hundred twenty-five million, three hundred fifteen thousand, five hundred sixty-nine".