2406405 has 16 divisors (see below), whose sum is σ = 3881664. Its totient is φ = 1272960.

The previous prime is 2406379. The next prime is 2406457. The reversal of 2406405 is 5046042.

It is a happy number.

It is not a de Polignac number, because 2406405 - 2⁵ = 2406373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470 + ... + 2640.

It is an arithmetic number, because the mean of its divisors is an integer number (242604).

2^2406405 is an apocalyptic number.

It is an amenable number.

2406405 is a deficient number, since it is larger than the sum of its proper divisors (1475259).

2406405 is a wasteful number, since it uses less digits than its factorization.

2406405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2406405 is about 1551.2591659681. The cubic root of 2406405 is about 134.0055875000.

The spelling of 2406405 in words is "two million, four hundred six thousand, four hundred five".