1264971831 has 8 divisors (see below), whose sum is σ = 1686881664. Its totient is φ = 843188280.

The previous prime is 1264971803. The next prime is 1264971857. The reversal of 1264971831 is 1381794621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1264971831 - 2²² = 1260777527 is a prime.

It is a super-2 number, since 2×1264971831² = 3200307466446985122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264971031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001 + ... + 50546.

It is an arithmetic number, because the mean of its divisors is an integer number (210860208).

Almost surely, 2^1264971831 is an apocalyptic number.

1264971831 is a deficient number, since it is larger than the sum of its proper divisors (421909833).

1264971831 is an equidigital number, since it uses as much as digits as its factorization.

1264971831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63141.

The product of its digits is 72576, while the sum is 42.

The square root of 1264971831 is about 35566.4424844544. The cubic root of 1264971831 is about 1081.5010651751.

The spelling of 1264971831 in words is "one billion, two hundred sixty-four million, nine hundred seventy-one thousand, eight hundred thirty-one".