1264636052 has 24 divisors (see below), whose sum is σ = 2351330856. Its totient is φ = 593082368.

The previous prime is 1264636033. The next prime is 1264636073. The reversal of 1264636052 is 2506364621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 494795536 + 769840516 = 22244^2 + 27746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11813 + ... + 51660.

It is an arithmetic number, because the mean of its divisors is an integer number (97972119).

Almost surely, 2^1264636052 is an apocalyptic number.

It is an amenable number.

1264636052 is a deficient number, since it is larger than the sum of its proper divisors (1086694804).

1264636052 is a wasteful number, since it uses less digits than its factorization.

1264636052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63787 (or 63785 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1264636052 is about 35561.7217243485. The cubic root of 1264636052 is about 1081.4053641026.

The spelling of 1264636052 in words is "one billion, two hundred sixty-four million, six hundred thirty-six thousand, fifty-two".