1264688 has 10 divisors (see below), whose sum is σ = 2450364. Its totient is φ = 632336.

The previous prime is 1264687. The next prime is 1264699. The reversal of 1264688 is 8864621.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1264687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39506 + ... + 39537.

2^1264688 is an apocalyptic number.

It is an amenable number.

1264688 is a deficient number, since it is larger than the sum of its proper divisors (1185676).

1264688 is an equidigital number, since it uses as much as digits as its factorization.

1264688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79051 (or 79045 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 1264688 is about 1124.5834784488. The cubic root of 1264688 is about 108.1420171018.

The spelling of 1264688 in words is "one million, two hundred sixty-four thousand, six hundred eighty-eight".