1264636 has 12 divisors (see below), whose sum is σ = 2221128. Its totient is φ = 630032.

The previous prime is 1264607. The next prime is 1264643. The reversal of 1264636 is 6364621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (185094).

2^1264636 is an apocalyptic number.

It is an amenable number.

1264636 is a deficient number, since it is larger than the sum of its proper divisors (956492).

1264636 is a wasteful number, since it uses less digits than its factorization.

1264636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1146 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 1264636 is about 1124.5603585402. The cubic root of 1264636 is about 108.1405349281.

The spelling of 1264636 in words is "one million, two hundred sixty-four thousand, six hundred thirty-six".