404132621 has 2 divisors, whose sum is σ = 404132622. Its totient is φ = 404132620.

The previous prime is 404132587. The next prime is 404132633. The reversal of 404132621 is 126231404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213306025 + 190826596 = 14605^2 + 13814^2 .

It is a cyclic number.

It is not a de Polignac number, because 404132621 - 2²² = 399938317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404132681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202066310 + 202066311.

It is an arithmetic number, because the mean of its divisors is an integer number (202066311).

Almost surely, 2^404132621 is an apocalyptic number.

It is an amenable number.

404132621 is a deficient number, since it is larger than the sum of its proper divisors (1).

404132621 is an equidigital number, since it uses as much as digits as its factorization.

404132621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 404132621 is about 20103.0500422200. The cubic root of 404132621 is about 739.3350619292.

It can be divided in two parts, 40413 and 2621, that added together give a palindrome (43034).

The spelling of 404132621 in words is "four hundred four million, one hundred thirty-two thousand, six hundred twenty-one".