2564356 has 6 divisors (see below), whose sum is σ = 4487630. Its totient is φ = 1282176.

The previous prime is 2564347. The next prime is 2564363. The reversal of 2564356 is 6534652.

It can be written as a sum of positive squares in only one way, i.e., 2560000 + 4356 = 1600^2 + 66^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 320541 + ... + 320548.

2^2564356 is an apocalyptic number.

It is an amenable number.

2564356 is a deficient number, since it is larger than the sum of its proper divisors (1923274).

2564356 is a wasteful number, since it uses less digits than its factorization.

2564356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641093 (or 641091 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 2564356 is about 1601.3606714291. The cubic root of 2564356 is about 136.8756219261.

It can be divided in two parts, 256 and 4356, that multiplied together give a square (1115136 = 1056²).

The spelling of 2564356 in words is "two million, five hundred sixty-four thousand, three hundred fifty-six".