401906 has 8 divisors (see below), whose sum is σ = 609024. Its totient is φ = 198900.

The previous prime is 401903. The next prime is 401909. The reversal of 401906 is 609104.

It is an interprime number because it is at equal distance from previous prime (401903) and next prime (401909).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 770 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (76128).

2⁴⁰¹⁹⁰⁶ is an apocalyptic number.

401906 is a deficient number, since it is larger than the sum of its proper divisors (207118).

401906 is a wasteful number, since it uses less digits than its factorization.

401906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 401906 is about 633.9605665970. The cubic root of 401906 is about 73.7974739822.

The spelling of 401906 in words is "four hundred one thousand, nine hundred six".