1292111931 has 12 divisors (see below), whose sum is σ = 1893674216. Its totient is φ = 783097920.

The previous prime is 1292111923. The next prime is 1292111959. The reversal of 1292111931 is 1391112921.

It is not a de Polignac number, because 1292111931 - 2³ = 1292111923 is a prime.

It is a super-2 number, since 2×1292111931² = 3339106484465097522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1292111531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1779406 + ... + 1780131.

Almost surely, 2^1292111931 is an apocalyptic number.

1292111931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1292111931 is a deficient number, since it is larger than the sum of its proper divisors (601562285).

1292111931 is a wasteful number, since it uses less digits than its factorization.

1292111931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559562 (or 3559551 counting only the distinct ones).

The product of its digits is 972, while the sum is 30.

The square root of 1292111931 is about 35945.9584793618. The cubic root of 1292111931 is about 1089.1809718627.

The spelling of 1292111931 in words is "one billion, two hundred ninety-two million, one hundred eleven thousand, nine hundred thirty-one".