401006 has 8 divisors (see below), whose sum is σ = 617880. Its totient is φ = 195048.

The previous prime is 400997. The next prime is 401017. The reversal of 401006 is 600104.

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

It is a congruent number.

It is an unprimeable number.

401006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (77235).

2⁴⁰¹⁰⁰⁶ is an apocalyptic number.

401006 is a deficient number, since it is larger than the sum of its proper divisors (216874).

401006 is a wasteful number, since it uses less digits than its factorization.

401006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 401006 is about 633.2503454401. The cubic root of 401006 is about 73.7423471902.

The spelling of 401006 in words is "four hundred one thousand, six".