1264655312 has 20 divisors (see below), whose sum is σ = 2463104256. Its totient is φ = 629015520.

The previous prime is 1264655281. The next prime is 1264655339. The reversal of 1264655312 is 2135564621.

It is a super-3 number, since 3×1264655312³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203858 + ... + 209969.

Almost surely, 2^1264655312 is an apocalyptic number.

It is an amenable number.

1264655312 is a deficient number, since it is larger than the sum of its proper divisors (1198448944).

1264655312 is a wasteful number, since it uses less digits than its factorization.

1264655312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414026 (or 414020 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1264655312 is about 35561.9925201049. The cubic root of 1264655312 is about 1081.4108538933.

The spelling of 1264655312 in words is "one billion, two hundred sixty-four million, six hundred fifty-five thousand, three hundred twelve".