406922421 has 8 divisors (see below), whose sum is σ = 574478784. Its totient is φ = 255323840.

The previous prime is 406922413. The next prime is 406922429. The reversal of 406922421 is 124229604.

It is an interprime number because it is at equal distance from previous prime (406922413) and next prime (406922429).

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

It is a cyclic number.

It is not a de Polignac number, because 406922421 - 2³ = 406922413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406922429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3989385 + ... + 3989486.

It is an arithmetic number, because the mean of its divisors is an integer number (71809848).

Almost surely, 2^406922421 is an apocalyptic number.

It is an amenable number.

406922421 is a deficient number, since it is larger than the sum of its proper divisors (167556363).

406922421 is a wasteful number, since it uses less digits than its factorization.

406922421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978891.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 406922421 is about 20172.3181860687. The cubic root of 406922421 is about 741.0324163854.

The spelling of 406922421 in words is "four hundred six million, nine hundred twenty-two thousand, four hundred twenty-one".