406407 has 4 divisors (see below), whose sum is σ = 541880. Its totient is φ = 270936.

The previous prime is 406403. The next prime is 406423. The reversal of 406407 is 704604.

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

It is not a de Polignac number, because 406407 - 2² = 406403 is a prime.

It is a D-number.

It is the 638-th Hogben number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406407.

It is not an unprimeable number, because it can be changed into a prime (406403) by changing a digit.

It is a nontrivial repunit in base 637.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67732 + ... + 67737.

It is an arithmetic number, because the mean of its divisors is an integer number (135470).

2⁴⁰⁶⁴⁰⁷ is an apocalyptic number.

406407 is a deficient number, since it is larger than the sum of its proper divisors (135473).

406407 is a wasteful number, since it uses less digits than its factorization.

406407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135472.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 406407 is about 637.5005882350. The cubic root of 406407 is about 74.0719412380.

The spelling of 406407 in words is "four hundred six thousand, four hundred seven".