1268664 has 16 divisors (see below), whose sum is σ = 3171720. Its totient is φ = 422880.

The previous prime is 1268633. The next prime is 1268669. The reversal of 1268664 is 4668621.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26407 + ... + 26454.

2^1268664 is an apocalyptic number.

It is an amenable number.

1268664 is an abundant number, since it is smaller than the sum of its proper divisors (1903056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268664 is a wasteful number, since it uses less digits than its factorization.

1268664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52870 (or 52866 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 1268664 is about 1126.3498568385. The cubic root of 1268664 is about 108.2552262765.

The spelling of 1268664 in words is "one million, two hundred sixty-eight thousand, six hundred sixty-four".