1290900872 has 32 divisors (see below), whose sum is σ = 2481321600. Its totient is φ = 629319744.

The previous prime is 1290900857. The next prime is 1290900889. The reversal of 1290900872 is 2780090921.

It is a super-2 number, since 2×1290900872² = 3332850122660720768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94763 + ... + 107525.

It is an arithmetic number, because the mean of its divisors is an integer number (77541300).

Almost surely, 2^1290900872 is an apocalyptic number.

It is an amenable number.

1290900872 is a deficient number, since it is larger than the sum of its proper divisors (1190420728).

1290900872 is a wasteful number, since it uses less digits than its factorization.

1290900872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13085 (or 13081 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1290900872 is about 35929.1089786541. The cubic root of 1290900872 is about 1088.8405795928.

The spelling of 1290900872 in words is "one billion, two hundred ninety million, nine hundred thousand, eight hundred seventy-two".