406320401 has 4 divisors (see below), whose sum is σ = 407246400. Its totient is φ = 405394404.

The previous prime is 406320367. The next prime is 406320407. The reversal of 406320401 is 104023604.

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-406320401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406320407) 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, 462341 + ... + 463218.

It is an arithmetic number, because the mean of its divisors is an integer number (101811600).

Almost surely, 2^406320401 is an apocalyptic number.

It is an amenable number.

406320401 is a deficient number, since it is larger than the sum of its proper divisors (925999).

406320401 is an equidigital number, since it uses as much as digits as its factorization.

406320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925998.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 406320401 is about 20157.3907289609. The cubic root of 406320401 is about 740.6667967202. Note that the first 3 decimals are identical.

The spelling of 406320401 in words is "four hundred six million, three hundred twenty thousand, four hundred one".