125365865 has 4 divisors (see below), whose sum is σ = 150439044. Its totient is φ = 100292688.

The previous prime is 125365859. The next prime is 125365901. The reversal of 125365865 is 568563521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568563521 = 17 ⋅33444913.

It can be written as a sum of positive squares in 2 ways, for example, as 19749136 + 105616729 = 4444^2 + 10277^2 .

It is a cyclic number.

It is not a de Polignac number, because 125365865 - 2⁸ = 125365609 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 12536582 + ... + 12536591.

It is an arithmetic number, because the mean of its divisors is an integer number (37609761).

Almost surely, 2^125365865 is an apocalyptic number.

It is an amenable number.

125365865 is a deficient number, since it is larger than the sum of its proper divisors (25073179).

125365865 is an equidigital number, since it uses as much as digits as its factorization.

125365865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25073178.

The product of its digits is 216000, while the sum is 41.

The square root of 125365865 is about 11196.6899126483. The cubic root of 125365865 is about 500.4873448357.

The spelling of 125365865 in words is "one hundred twenty-five million, three hundred sixty-five thousand, eight hundred sixty-five".