1264774631 has 2 divisors, whose sum is σ = 1264774632. Its totient is φ = 1264774630.

The previous prime is 1264774613. The next prime is 1264774703. The reversal of 1264774631 is 1364774621.

Together with previous prime (1264774613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264774631 is a prime.

It is a super-2 number, since 2×1264774631² = 3199309734442372322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264774031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632387315 + 632387316.

It is an arithmetic number, because the mean of its divisors is an integer number (632387316).

Almost surely, 2^1264774631 is an apocalyptic number.

1264774631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264774631 is an equidigital number, since it uses as much as digits as its factorization.

1264774631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 1264774631 is about 35563.6701002582. The cubic root of 1264774631 is about 1081.4448628449. Note that the first 3 decimals are identical.

It can be divided in two parts, 12647 and 74631, that added together give a palindrome (87278).

The spelling of 1264774631 in words is "one billion, two hundred sixty-four million, seven hundred seventy-four thousand, six hundred thirty-one".