125116865 has 4 divisors (see below), whose sum is σ = 150140244. Its totient is φ = 100093488.

The previous prime is 125116861. The next prime is 125116879. The reversal of 125116865 is 568611521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83759104 + 41357761 = 9152^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 125116865 - 2² = 125116861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125116861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12511682 + ... + 12511691.

It is an arithmetic number, because the mean of its divisors is an integer number (37535061).

Almost surely, 2^125116865 is an apocalyptic number.

It is an amenable number.

125116865 is a deficient number, since it is larger than the sum of its proper divisors (25023379).

125116865 is an equidigital number, since it uses as much as digits as its factorization.

125116865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25023378.

The product of its digits is 14400, while the sum is 35.

The square root of 125116865 is about 11185.5650281959. The cubic root of 125116865 is about 500.1557714655.

The spelling of 125116865 in words is "one hundred twenty-five million, one hundred sixteen thousand, eight hundred sixty-five".