1264656 has 20 divisors (see below), whose sum is σ = 3267152. Its totient is φ = 421536.

The previous prime is 1264651. The next prime is 1264657. The reversal of 1264656 is 6564621.

It is not an unprimeable number, because it can be changed into a prime (1264651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13126 + ... + 13221.

2^1264656 is an apocalyptic number.

1264656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1264656 is an abundant number, since it is smaller than the sum of its proper divisors (2002496).

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

1264656 is a wasteful number, since it uses less digits than its factorization.

1264656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26358 (or 26352 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 1264656 is about 1124.5692508690. The cubic root of 1264656 is about 108.1411049997.

The spelling of 1264656 in words is "one million, two hundred sixty-four thousand, six hundred fifty-six".