406330421 has 4 divisors (see below), whose sum is σ = 464377632. Its totient is φ = 348283212.

The previous prime is 406330399. The next prime is 406330439. The reversal of 406330421 is 124033604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406330421 is a prime.

It is a super-2 number, since 2×406330421² = 330208822060074482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406330451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29023595 + ... + 29023608.

It is an arithmetic number, because the mean of its divisors is an integer number (116094408).

Almost surely, 2^406330421 is an apocalyptic number.

It is an amenable number.

406330421 is a deficient number, since it is larger than the sum of its proper divisors (58047211).

406330421 is an equidigital number, since it uses as much as digits as its factorization.

406330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58047210.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 406330421 is about 20157.6392715020. The cubic root of 406330421 is about 740.6728850356.

The spelling of 406330421 in words is "four hundred six million, three hundred thirty thousand, four hundred twenty-one".