4025165 has 4 divisors (see below), whose sum is σ = 4830204. Its totient is φ = 3220128.

The previous prime is 4025111. The next prime is 4025167. The reversal of 4025165 is 5615204.

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 1705636 + 2319529 = 1306^2 + 1523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4025165 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4025165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4025167) 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, 402512 + ... + 402521.

It is an arithmetic number, because the mean of its divisors is an integer number (1207551).

Almost surely, 2^4025165 is an apocalyptic number.

It is an amenable number.

4025165 is a deficient number, since it is larger than the sum of its proper divisors (805039).

4025165 is an equidigital number, since it uses as much as digits as its factorization.

4025165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805038.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 4025165 is about 2006.2813860473. The cubic root of 4025165 is about 159.0723007549.

The spelling of 4025165 in words is "four million, twenty-five thousand, one hundred sixty-five".