1268564 has 18 divisors (see below), whose sum is σ = 2441082. Its totient is φ = 576400.

The previous prime is 1268563. The next prime is 1268567. The reversal of 1268564 is 4658621.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 58564 = 1100^2 + 242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1268564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 827 + ... + 1794.

2^1268564 is an apocalyptic number.

It is an amenable number.

1268564 is a deficient number, since it is larger than the sum of its proper divisors (1172518).

1268564 is a wasteful number, since it uses less digits than its factorization.

1268564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2634 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 1268564 is about 1126.3054647830. The cubic root of 1268564 is about 108.2523818651.

The spelling of 1268564 in words is "one million, two hundred sixty-eight thousand, five hundred sixty-four".