125516165 has 4 divisors (see below), whose sum is σ = 150619404. Its totient is φ = 100412928.

The previous prime is 125516141. The next prime is 125516189. The reversal of 125516165 is 561615521.

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

It is an interprime number because it is at equal distance from previous prime (125516141) and next prime (125516189).

It can be written as a sum of positive squares in 2 ways, for example, as 24433249 + 101082916 = 4943^2 + 10054^2 .

It is a cyclic number.

It is not a de Polignac number, because 125516165 - 2⁸ = 125515909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12551612 + ... + 12551621.

It is an arithmetic number, because the mean of its divisors is an integer number (37654851).

Almost surely, 2^125516165 is an apocalyptic number.

It is an amenable number.

125516165 is a deficient number, since it is larger than the sum of its proper divisors (25103239).

125516165 is an equidigital number, since it uses as much as digits as its factorization.

125516165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25103238.

The product of its digits is 9000, while the sum is 32.

The square root of 125516165 is about 11203.3997072317. The cubic root of 125516165 is about 500.6872748737.

The spelling of 125516165 in words is "one hundred twenty-five million, five hundred sixteen thousand, one hundred sixty-five".