1272843172 has 12 divisors (see below), whose sum is σ = 2279277616. Its totient is φ = 621621000.

The previous prime is 1272843163. The next prime is 1272843197. The reversal of 1272843172 is 2713482721.

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, 3699954 + ... + 3700297.

Almost surely, 2^1272843172 is an apocalyptic number.

It is an amenable number.

1272843172 is a deficient number, since it is larger than the sum of its proper divisors (1006434444).

1272843172 is a wasteful number, since it uses less digits than its factorization.

1272843172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400298 (or 7400296 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 1272843172 is about 35676.9277264733. The cubic root of 1272843172 is about 1083.7396571177.

The spelling of 1272843172 in words is "one billion, two hundred seventy-two million, eight hundred forty-three thousand, one hundred seventy-two".