406641 has 8 divisors (see below), whose sum is σ = 548640. Its totient is φ = 267872.

The previous prime is 406633. The next prime is 406649. The reversal of 406641 is 146604.

It is an interprime number because it is at equal distance from previous prime (406633) and next prime (406649).

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 406641 - 2³ = 406633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (406649) 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, 495 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (68580).

2⁴⁰⁶⁶⁴¹ is an apocalyptic number.

It is an amenable number.

406641 is a deficient number, since it is larger than the sum of its proper divisors (141999).

406641 is a wasteful number, since it uses less digits than its factorization.

406641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 406641 is about 637.6840910670. The cubic root of 406641 is about 74.0861548290.

The spelling of 406641 in words is "four hundred six thousand, six hundred forty-one".