406332421 has 16 divisors (see below), whose sum is σ = 469467648. Its totient is φ = 348044400.

The previous prime is 406332403. The next prime is 406332449. The reversal of 406332421 is 124233604.

It is not a de Polignac number, because 406332421 - 2¹³ = 406324229 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 (406332401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4966 + ... + 28936.

It is an arithmetic number, because the mean of its divisors is an integer number (29341728).

Almost surely, 2^406332421 is an apocalyptic number.

It is an amenable number.

406332421 is a deficient number, since it is larger than the sum of its proper divisors (63135227).

406332421 is a wasteful number, since it uses less digits than its factorization.

406332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24072.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 406332421 is about 20157.6888804248. The cubic root of 406332421 is about 740.6741002562.

The spelling of 406332421 in words is "four hundred six million, three hundred thirty-two thousand, four hundred twenty-one".