4025605 has 4 divisors (see below), whose sum is σ = 4830732. Its totient is φ = 3220480.

The previous prime is 4025599. The next prime is 4025627. The reversal of 4025605 is 5065204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2979076 + 1046529 = 1726^2 + 1023^2 .

It is not a de Polignac number, because 4025605 - 2¹⁵ = 3992837 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam 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, 402556 + ... + 402565.

It is an arithmetic number, because the mean of its divisors is an integer number (1207683).

Almost surely, 2^4025605 is an apocalyptic number.

It is an amenable number.

4025605 is a deficient number, since it is larger than the sum of its proper divisors (805127).

4025605 is an equidigital number, since it uses as much as digits as its factorization.

4025605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805126.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 4025605 is about 2006.3910386562. The cubic root of 4025605 is about 159.0780967295.

The spelling of 4025605 in words is "four million, twenty-five thousand, six hundred five".