572138561 has 4 divisors (see below), whose sum is σ = 572270724. Its totient is φ = 572006400.

The previous prime is 572138543. The next prime is 572138563. The reversal of 572138561 is 165831275.

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 333281536 + 238857025 = 18256^2 + 15455^2 .

It is a cyclic number.

It is not a de Polignac number, because 572138561 - 2²⁶ = 505029697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (572138563) 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, 59360 + ... + 68321.

It is an arithmetic number, because the mean of its divisors is an integer number (143067681).

Almost surely, 2^572138561 is an apocalyptic number.

It is an amenable number.

572138561 is a deficient number, since it is larger than the sum of its proper divisors (132163).

572138561 is a wasteful number, since it uses less digits than its factorization.

572138561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132162.

The product of its digits is 50400, while the sum is 38.

The square root of 572138561 is about 23919.4180740251. The cubic root of 572138561 is about 830.1700725662.

The spelling of 572138561 in words is "five hundred seventy-two million, one hundred thirty-eight thousand, five hundred sixty-one".