572661 has 6 divisors (see below), whose sum is σ = 827190. Its totient is φ = 381768.

The previous prime is 572659. The next prime is 572683. The reversal of 572661 is 166275.

It can be written as a sum of positive squares in only one way, i.e., 463761 + 108900 = 681^2 + 330^2 .

It is not a de Polignac number, because 572661 - 2¹ = 572659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31806 + ... + 31823.

It is an arithmetic number, because the mean of its divisors is an integer number (137865).

2⁵⁷²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

572661 is a deficient number, since it is larger than the sum of its proper divisors (254529).

572661 is a wasteful number, since it uses less digits than its factorization.

572661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63635 (or 63632 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 572661 is about 756.7436818369. The cubic root of 572661 is about 83.0422681116.

The spelling of 572661 in words is "five hundred seventy-two thousand, six hundred sixty-one".