572421 has 4 divisors (see below), whose sum is σ = 763232. Its totient is φ = 381612.

The previous prime is 572419. The next prime is 572423. The reversal of 572421 is 124275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (572419) and next prime (572423).

It is not a de Polignac number, because 572421 - 2¹ = 572419 is a prime.

It is a D-number.

It is a Duffinian number.

572421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572423) 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, 95401 + ... + 95406.

It is an arithmetic number, because the mean of its divisors is an integer number (190808).

2⁵⁷²⁴²¹ is an apocalyptic number.

It is an amenable number.

572421 is a deficient number, since it is larger than the sum of its proper divisors (190811).

572421 is a wasteful number, since it uses less digits than its factorization.

572421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190810.

The product of its digits is 560, while the sum is 21.

The square root of 572421 is about 756.5850910506. The cubic root of 572421 is about 83.0306655933.

Adding to 572421 its reverse (124275), we get a palindrome (696696).

The spelling of 572421 in words is "five hundred seventy-two thousand, four hundred twenty-one".