1264664 has 24 divisors (see below), whose sum is σ = 2523540. Its totient is φ = 594048.

The previous prime is 1264663. The next prime is 1264667. The reversal of 1264664 is 4664621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2039 + ... + 2585.

2^1264664 is an apocalyptic number.

It is an amenable number.

1264664 is a deficient number, since it is larger than the sum of its proper divisors (1258876).

1264664 is a wasteful number, since it uses less digits than its factorization.

1264664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 566 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 1264664 is about 1124.5728077808. The cubic root of 1264664 is about 108.1413330267.

The spelling of 1264664 in words is "one million, two hundred sixty-four thousand, six hundred sixty-four".