401912405 has 4 divisors (see below), whose sum is σ = 482294892. Its totient is φ = 321529920.

The previous prime is 401912359. The next prime is 401912417. The reversal of 401912405 is 504219104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41899729 + 360012676 = 6473^2 + 18974^2 .

It is not a de Polignac number, because 401912405 - 2²⁰ = 400863829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40191236 + ... + 40191245.

It is an arithmetic number, because the mean of its divisors is an integer number (120573723).

Almost surely, 2^401912405 is an apocalyptic number.

It is an amenable number.

401912405 is a deficient number, since it is larger than the sum of its proper divisors (80382487).

401912405 is an equidigital number, since it uses as much as digits as its factorization.

401912405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80382486.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 401912405 is about 20047.7531159978. The cubic root of 401912405 is about 737.9786600616.

The spelling of 401912405 in words is "four hundred one million, nine hundred twelve thousand, four hundred five".