406462621 has 2 divisors, whose sum is σ = 406462622. Its totient is φ = 406462620.

The previous prime is 406462619. The next prime is 406462681. The reversal of 406462621 is 126264604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353026521 + 53436100 = 18789^2 + 7310^2 .

It is a cyclic number.

It is not a de Polignac number, because 406462621 - 2¹ = 406462619 is a prime.

Together with 406462619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406462681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203231310 + 203231311.

It is an arithmetic number, because the mean of its divisors is an integer number (203231311).

Almost surely, 2^406462621 is an apocalyptic number.

It is an amenable number.

406462621 is a deficient number, since it is larger than the sum of its proper divisors (1).

406462621 is an equidigital number, since it uses as much as digits as its factorization.

406462621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 406462621 is about 20160.9181586554. The cubic root of 406462621 is about 740.7532025417.

The spelling of 406462621 in words is "four hundred six million, four hundred sixty-two thousand, six hundred twenty-one".