1271812792 has 16 divisors (see below), whose sum is σ = 2394887040. Its totient is φ = 633176256.

The previous prime is 1271812783. The next prime is 1271812799. The reversal of 1271812792 is 2972181721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271812799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339288 + ... + 343015.

It is an arithmetic number, because the mean of its divisors is an integer number (149680440).

Almost surely, 2^1271812792 is an apocalyptic number.

It is an amenable number.

1271812792 is a deficient number, since it is larger than the sum of its proper divisors (1123074248).

1271812792 is a wasteful number, since it uses less digits than its factorization.

1271812792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682542 (or 682538 counting only the distinct ones).

The product of its digits is 28224, while the sum is 40.

The square root of 1271812792 is about 35662.4843778445. The cubic root of 1271812792 is about 1083.4471452710.

The spelling of 1271812792 in words is "one billion, two hundred seventy-one million, eight hundred twelve thousand, seven hundred ninety-two".