1565628125 has 12 divisors (see below), whose sum is σ = 1956913812. Its totient is φ = 1252500000.

The previous prime is 1565628047. The next prime is 1565628131. The reversal of 1565628125 is 5218265651.

It can be written as a sum of positive squares in 6 ways, for example, as 1563253444 + 2374681 = 39538^2 + 1541^2 .

It is not a de Polignac number, because 1565628125 - 2¹⁰ = 1565627101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247376 + ... + 253625.

It is an arithmetic number, because the mean of its divisors is an integer number (163076151).

Almost surely, 2^1565628125 is an apocalyptic number.

It is an amenable number.

1565628125 is a deficient number, since it is larger than the sum of its proper divisors (391285687).

1565628125 is an frugal number, since it uses more digits than its factorization.

1565628125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501026 (or 501006 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 1565628125 is about 39568.0189673428. The cubic root of 1565628125 is about 1161.1710639502.

The spelling of 1565628125 in words is "one billion, five hundred sixty-five million, six hundred twenty-eight thousand, one hundred twenty-five".