576421 has 2 divisors, whose sum is σ = 576422. Its totient is φ = 576420.

The previous prime is 576391. The next prime is 576427. The reversal of 576421 is 124675.

576421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408321 + 168100 = 639^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 576421 - 2⁷ = 576293 is a prime.

It is a super-2 number, since 2×576421² = 664522338482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (576427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288210 + 288211.

It is an arithmetic number, because the mean of its divisors is an integer number (288211).

2⁵⁷⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

576421 is a deficient number, since it is larger than the sum of its proper divisors (1).

576421 is an equidigital number, since it uses as much as digits as its factorization.

576421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 576421 is about 759.2239458816. The cubic root of 576421 is about 83.2236191726.

The spelling of 576421 in words is "five hundred seventy-six thousand, four hundred twenty-one".