406667 has 8 divisors (see below), whose sum is σ = 433200. Its totient is φ = 381024.

The previous prime is 406661. The next prime is 406673. The reversal of 406667 is 766604.

It is an interprime number because it is at equal distance from previous prime (406661) and next prime (406673).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406661) 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, 884 + ... + 1262.

It is an arithmetic number, because the mean of its divisors is an integer number (54150).

2⁴⁰⁶⁶⁶⁷ is an apocalyptic number.

406667 is a deficient number, since it is larger than the sum of its proper divisors (26533).

406667 is a wasteful number, since it uses less digits than its factorization.

406667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 406667 is about 637.7044770111. The cubic root of 406667 is about 74.0877337803.

The spelling of 406667 in words is "four hundred six thousand, six hundred sixty-seven".