406452221 has 8 divisors (see below), whose sum is σ = 464760960. Its totient is φ = 348204528.

The previous prime is 406452203. The next prime is 406452227. The reversal of 406452221 is 122254604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406452221 - 2⁶ = 406452157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406452227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35 + ... + 28511.

It is an arithmetic number, because the mean of its divisors is an integer number (58095120).

Almost surely, 2^406452221 is an apocalyptic number.

It is an amenable number.

406452221 is a deficient number, since it is larger than the sum of its proper divisors (58308739).

406452221 is a wasteful number, since it uses less digits than its factorization.

406452221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30523.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 406452221 is about 20160.6602322444. The cubic root of 406452221 is about 740.7468847004.

The spelling of 406452221 in words is "four hundred six million, four hundred fifty-two thousand, two hundred twenty-one".