1565412725 has 6 divisors (see below), whose sum is σ = 1941111810. Its totient is φ = 1252330160.

The previous prime is 1565412713. The next prime is 1565412731. The reversal of 1565412725 is 5272145651.

It can be written as a sum of positive squares in 3 ways, for example, as 382671844 + 1182740881 = 19562^2 + 34391^2 .

It is not a de Polignac number, because 1565412725 - 2⁶ = 1565412661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31308230 + ... + 31308279.

It is an arithmetic number, because the mean of its divisors is an integer number (323518635).

Almost surely, 2^1565412725 is an apocalyptic number.

It is an amenable number.

1565412725 is a deficient number, since it is larger than the sum of its proper divisors (375699085).

1565412725 is an equidigital number, since it uses as much as digits as its factorization.

1565412725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62616519 (or 62616514 counting only the distinct ones).

The product of its digits is 84000, while the sum is 38.

The square root of 1565412725 is about 39565.2969785392. The cubic root of 1565412725 is about 1161.1178099847.

The spelling of 1565412725 in words is "one billion, five hundred sixty-five million, four hundred twelve thousand, seven hundred twenty-five".