1581024972 has 12 divisors (see below), whose sum is σ = 3689058296. Its totient is φ = 527008320.

The previous prime is 1581024967. The next prime is 1581024997. The reversal of 1581024972 is 2794201851.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1581024972.

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, 65876029 + ... + 65876052.

Almost surely, 2^1581024972 is an apocalyptic number.

1581024972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1581024972 is an abundant number, since it is smaller than the sum of its proper divisors (2108033324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1581024972 is a wasteful number, since it uses less digits than its factorization.

1581024972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131752088 (or 131752086 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1581024972 is about 39762.1047229646. The cubic root of 1581024972 is about 1164.9650862949.

The spelling of 1581024972 in words is "one billion, five hundred eighty-one million, twenty-four thousand, nine hundred seventy-two".