406187 has 4 divisors (see below), whose sum is σ = 416136. Its totient is φ = 396240.

The previous prime is 406183. The next prime is 406207. The reversal of 406187 is 781604.

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

It is a cyclic number.

It is not a de Polignac number, because 406187 - 2² = 406183 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406187.

It is not an unprimeable number, because it can be changed into a prime (406183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4913 + ... + 4994.

It is an arithmetic number, because the mean of its divisors is an integer number (104034).

2⁴⁰⁶¹⁸⁷ is an apocalyptic number.

406187 is a deficient number, since it is larger than the sum of its proper divisors (9949).

406187 is an equidigital number, since it uses as much as digits as its factorization.

406187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 406187 is about 637.3280160169. The cubic root of 406187 is about 74.0585730558.

The spelling of 406187 in words is "four hundred six thousand, one hundred eighty-seven".