826564 has 6 divisors (see below), whose sum is σ = 1446494. Its totient is φ = 413280.

The previous prime is 826561. The next prime is 826571. The reversal of 826564 is 465628.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 350464 = 690^2 + 592^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (826561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103317 + ... + 103324.

2⁸²⁶⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

826564 is a deficient number, since it is larger than the sum of its proper divisors (619930).

826564 is a wasteful number, since it uses less digits than its factorization.

826564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206645 (or 206643 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 826564 is about 909.1556522400. The cubic root of 826564 is about 93.8481023445.

The spelling of 826564 in words is "eight hundred twenty-six thousand, five hundred sixty-four".