1521601996 has 24 divisors (see below), whose sum is σ = 2686367376. Its totient is φ = 754098240.

The previous prime is 1521601981. The next prime is 1521602041. The reversal of 1521601996 is 6991061251.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214791 + ... + 221761.

It is an arithmetic number, because the mean of its divisors is an integer number (111931974).

Almost surely, 2^1521601996 is an apocalyptic number.

It is an amenable number.

1521601996 is a deficient number, since it is larger than the sum of its proper divisors (1164765380).

1521601996 is a wasteful number, since it uses less digits than its factorization.

1521601996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449 (or 7447 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 1521601996 is about 39007.7171339211. The cubic root of 1521601996 is about 1150.1832086183.

The spelling of 1521601996 in words is "one billion, five hundred twenty-one million, six hundred one thousand, nine hundred ninety-six".