421132571 has 2 divisors, whose sum is σ = 421132572. Its totient is φ = 421132570.

The previous prime is 421132531. The next prime is 421132573. The reversal of 421132571 is 175231124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421132571 - 2¹⁸ = 420870427 is a prime.

Together with 421132573, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421132571.

It is not a weakly prime, because it can be changed into another prime (421132573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210566285 + 210566286.

It is an arithmetic number, because the mean of its divisors is an integer number (210566286).

Almost surely, 2^421132571 is an apocalyptic number.

421132571 is a deficient number, since it is larger than the sum of its proper divisors (1).

421132571 is an equidigital number, since it uses as much as digits as its factorization.

421132571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 421132571 is about 20521.5148320001. The cubic root of 421132571 is about 749.5597837375.

Adding to 421132571 its reverse (175231124), we get a palindrome (596363695).

The spelling of 421132571 in words is "four hundred twenty-one million, one hundred thirty-two thousand, five hundred seventy-one".