1406405 has 32 divisors (see below), whose sum is σ = 2274048. Its totient is φ = 806400.

The previous prime is 1406389. The next prime is 1406417. The reversal of 1406405 is 5046041.

It is a happy number.

It is not a de Polignac number, because 1406405 - 2⁴ = 1406389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4865 + ... + 5145.

It is an arithmetic number, because the mean of its divisors is an integer number (71064).

2^1406405 is an apocalyptic number.

It is an amenable number.

1406405 is a deficient number, since it is larger than the sum of its proper divisors (867643).

1406405 is a wasteful number, since it uses less digits than its factorization.

1406405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1406405 is about 1185.9194745007. The cubic root of 1406405 is about 112.0392347660.

The spelling of 1406405 in words is "one million, four hundred six thousand, four hundred five".