1264012613 has 2 divisors, whose sum is σ = 1264012614. Its totient is φ = 1264012612.

The previous prime is 1264012579. The next prime is 1264012619. The reversal of 1264012613 is 3162104621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874858084 + 389154529 = 29578^2 + 19727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264012613 - 2¹² = 1264008517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264012619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632006306 + 632006307.

It is an arithmetic number, because the mean of its divisors is an integer number (632006307).

Almost surely, 2^1264012613 is an apocalyptic number.

It is an amenable number.

1264012613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264012613 is an equidigital number, since it uses as much as digits as its factorization.

1264012613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1264012613 is about 35552.9550529910. The cubic root of 1264012613 is about 1081.2276315196.

The spelling of 1264012613 in words is "one billion, two hundred sixty-four million, twelve thousand, six hundred thirteen".