406871 has 4 divisors (see below), whose sum is σ = 408744. Its totient is φ = 405000.

The previous prime is 406859. The next prime is 406873. The reversal of 406871 is 178604.

406871 is nontrivially palindromic in base 7.

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 406871 - 2⁶ = 406807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560 + ... + 1061.

It is an arithmetic number, because the mean of its divisors is an integer number (102186).

2⁴⁰⁶⁸⁷¹ is an apocalyptic number.

406871 is a deficient number, since it is larger than the sum of its proper divisors (1873).

406871 is a wasteful number, since it uses less digits than its factorization.

406871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

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

The square root of 406871 is about 637.8644056537. The cubic root of 406871 is about 74.1001201399.

The spelling of 406871 in words is "four hundred six thousand, eight hundred seventy-one".