872569 has 4 divisors (see below), whose sum is σ = 884596. Its totient is φ = 860544.

The previous prime is 872567. The next prime is 872587. The reversal of 872569 is 965278.

872569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 211600 = 813^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 872569 - 2¹ = 872567 is a prime.

It is a super-2 number, since 2×872569² = 1522753319522, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872561) 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, 5904 + ... + 6049.

It is an arithmetic number, because the mean of its divisors is an integer number (221149).

2⁸⁷²⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

872569 is a deficient number, since it is larger than the sum of its proper divisors (12027).

872569 is a wasteful number, since it uses less digits than its factorization.

872569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026.

The product of its digits is 30240, while the sum is 37.

The square root of 872569 is about 934.1140187365. The cubic root of 872569 is about 95.5578991573.

It can be divided in two parts, 872 and 569, that added together give a palindrome (1441).

The spelling of 872569 in words is "eight hundred seventy-two thousand, five hundred sixty-nine".