2605406 has 8 divisors (see below), whose sum is σ = 3925584. Its totient is φ = 1296880.

The previous prime is 2605391. The next prime is 2605409. The reversal of 2605406 is 6045062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (490698).

2^2605406 is an apocalyptic number.

2605406 is a deficient number, since it is larger than the sum of its proper divisors (1320178).

2605406 is a wasteful number, since it uses less digits than its factorization.

2605406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2605406 is about 1614.1270086335. The cubic root of 2605406 is about 137.6021235813.

The spelling of 2605406 in words is "two million, six hundred five thousand, four hundred six".