401905 has 8 divisors (see below), whose sum is σ = 551232. Its totient is φ = 275568.

The previous prime is 401903. The next prime is 401909. The reversal of 401905 is 509104.

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 401905 - 2¹ = 401903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5707 + ... + 5776.

It is an arithmetic number, because the mean of its divisors is an integer number (68904).

2⁴⁰¹⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

401905 is a deficient number, since it is larger than the sum of its proper divisors (149327).

401905 is a wasteful number, since it uses less digits than its factorization.

401905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11495.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 401905 is about 633.9597779039. The cubic root of 401905 is about 73.7974127759.

The spelling of 401905 in words is "four hundred one thousand, nine hundred five".