7904605 has 4 divisors (see below), whose sum is σ = 9485532. Its totient is φ = 6323680.

The previous prime is 7904591. The next prime is 7904621. The reversal of 7904605 is 5064097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5064097 = 53 ⋅95549.

It can be written as a sum of positive squares in 2 ways, for example, as 4990756 + 2913849 = 2234^2 + 1707^2 .

It is not a de Polignac number, because 7904605 - 2⁵ = 7904573 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790456 + ... + 790465.

It is an arithmetic number, because the mean of its divisors is an integer number (2371383).

Almost surely, 2^7904605 is an apocalyptic number.

It is an amenable number.

7904605 is a deficient number, since it is larger than the sum of its proper divisors (1580927).

7904605 is a wasteful number, since it uses less digits than its factorization.

7904605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580926.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 7904605 is about 2811.5129379037. The cubic root of 7904605 is about 199.2018607725.

The spelling of 7904605 in words is "seven million, nine hundred four thousand, six hundred five".