406731 has 8 divisors (see below), whose sum is σ = 584080. Its totient is φ = 250272.

The previous prime is 406729. The next prime is 406739. The reversal of 406731 is 137604.

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

It is not a de Polignac number, because 406731 - 2¹ = 406729 is a prime.

It is a super-2 number, since 2×406731² = 330860212722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406698 and 406707.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406731.

It is not an unprimeable number, because it can be changed into a prime (406739) 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, 5176 + ... + 5253.

It is an arithmetic number, because the mean of its divisors is an integer number (73010).

2⁴⁰⁶⁷³¹ is an apocalyptic number.

406731 is a deficient number, since it is larger than the sum of its proper divisors (177349).

406731 is a wasteful number, since it uses less digits than its factorization.

406731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 406731 is about 637.7546550203. The cubic root of 406731 is about 74.0916201429.

The spelling of 406731 in words is "four hundred six thousand, seven hundred thirty-one".