1272688831 has 12 divisors (see below), whose sum is σ = 1362901680. Its totient is φ = 1187642720.

The previous prime is 1272688819. The next prime is 1272688843. The reversal of 1272688831 is 1388862721.

It is an interprime number because it is at equal distance from previous prime (1272688819) and next prime (1272688843).

It is a de Polignac number, because none of the positive numbers 2^k-1272688831 is a prime.

It is a super-2 number, since 2×1272688831² = 3239473721104293122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272688801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7651 + ... + 51028.

It is an arithmetic number, because the mean of its divisors is an integer number (113575140).

Almost surely, 2^1272688831 is an apocalyptic number.

1272688831 is a deficient number, since it is larger than the sum of its proper divisors (90212849).

1272688831 is an equidigital number, since it uses as much as digits as its factorization.

1272688831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58766 (or 58743 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 1272688831 is about 35674.7646243111. The cubic root of 1272688831 is about 1083.6958517149.

The spelling of 1272688831 in words is "one billion, two hundred seventy-two million, six hundred eighty-eight thousand, eight hundred thirty-one".