406655 has 4 divisors (see below), whose sum is σ = 487992. Its totient is φ = 325320.

The previous prime is 406649. The next prime is 406661. The reversal of 406655 is 556604.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (406649) and next prime (406661).

It is not a de Polignac number, because 406655 - 2⁶ = 406591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40661 + ... + 40670.

It is an arithmetic number, because the mean of its divisors is an integer number (121998).

2⁴⁰⁶⁶⁵⁵ is an apocalyptic number.

406655 is a deficient number, since it is larger than the sum of its proper divisors (81337).

406655 is an equidigital number, since it uses as much as digits as its factorization.

406655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81336.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 406655 is about 637.6950681948. The cubic root of 406655 is about 74.0870050419.

The spelling of 406655 in words is "four hundred six thousand, six hundred fifty-five".