1620597925 has 24 divisors (see below), whose sum is σ = 2033789472. Its totient is φ = 1280904000.

The previous prime is 1620597911. The next prime is 1620597941. The reversal of 1620597925 is 5297950261.

It is not a de Polignac number, because 1620597925 - 2¹¹ = 1620595877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1526895 + ... + 1527955.

It is an arithmetic number, because the mean of its divisors is an integer number (84741228).

Almost surely, 2^1620597925 is an apocalyptic number.

It is an amenable number.

1620597925 is a deficient number, since it is larger than the sum of its proper divisors (413191547).

1620597925 is a wasteful number, since it uses less digits than its factorization.

1620597925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 1620597925 is about 40256.6506927737. The cubic root of 1620597925 is about 1174.6047682337.

The spelling of 1620597925 in words is "one billion, six hundred twenty million, five hundred ninety-seven thousand, nine hundred twenty-five".