406262621 has 2 divisors, whose sum is σ = 406262622. Its totient is φ = 406262620.

The previous prime is 406262611. The next prime is 406262641. The reversal of 406262621 is 126262604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343694521 + 62568100 = 18539^2 + 7910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406262621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406262611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203131310 + 203131311.

It is an arithmetic number, because the mean of its divisors is an integer number (203131311).

Almost surely, 2^406262621 is an apocalyptic number.

It is an amenable number.

406262621 is a deficient number, since it is larger than the sum of its proper divisors (1).

406262621 is an equidigital number, since it uses as much as digits as its factorization.

406262621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 406262621 is about 20155.9574567918. The cubic root of 406262621 is about 740.6316866969.

The spelling of 406262621 in words is "four hundred six million, two hundred sixty-two thousand, six hundred twenty-one".