1267980831 has 32 divisors (see below), whose sum is σ = 2056187840. Its totient is φ = 767491200.

The previous prime is 1267980809. The next prime is 1267980871. The reversal of 1267980831 is 1380897621.

It is not a de Polignac number, because 1267980831 - 2¹⁸ = 1267718687 is a prime.

It is a super-2 number, since 2×1267980831² = 3215550775566901122, 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 (1267980871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8200 + ... + 51021.

It is an arithmetic number, because the mean of its divisors is an integer number (64255870).

Almost surely, 2^1267980831 is an apocalyptic number.

1267980831 is a deficient number, since it is larger than the sum of its proper divisors (788207009).

1267980831 is a wasteful number, since it uses less digits than its factorization.

1267980831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59304 (or 59298 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1267980831 is about 35608.7184689368. The cubic root of 1267980831 is about 1082.3579116112.

The spelling of 1267980831 in words is "one billion, two hundred sixty-seven million, nine hundred eighty thousand, eight hundred thirty-one".