406111 has 4 divisors (see below), whose sum is σ = 423792. Its totient is φ = 388432.

The previous prime is 406093. The next prime is 406117. The reversal of 406111 is 111604.

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 406111 - 2⁹ = 405599 is a prime.

It is a super-2 number, since 2×406111² = 329852288642, 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 = 406091 and 406100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406117) 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, 8806 + ... + 8851.

It is an arithmetic number, because the mean of its divisors is an integer number (105948).

2⁴⁰⁶¹¹¹ is an apocalyptic number.

406111 is a deficient number, since it is larger than the sum of its proper divisors (17681).

406111 is a wasteful number, since it uses less digits than its factorization.

406111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17680.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 406111 is about 637.2683892992. The cubic root of 406111 is about 74.0539538348.

Adding to 406111 its reverse (111604), we get a palindrome (517715).

The spelling of 406111 in words is "four hundred six thousand, one hundred eleven".