406857 has 8 divisors (see below), whose sum is σ = 591840. Its totient is φ = 246560.

The previous prime is 406837. The next prime is 406859. The reversal of 406857 is 758604.

It is a happy number.

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 406857 - 2⁷ = 406729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406859) 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, 6132 + ... + 6197.

It is an arithmetic number, because the mean of its divisors is an integer number (73980).

2⁴⁰⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

406857 is a deficient number, since it is larger than the sum of its proper divisors (184983).

406857 is a wasteful number, since it uses less digits than its factorization.

406857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12343.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 406857 is about 637.8534314402. The cubic root of 406857 is about 74.0992702280.

The spelling of 406857 in words is "four hundred six thousand, eight hundred fifty-seven".