3665572 has 12 divisors (see below), whose sum is σ = 6462540. Its totient is φ = 1819136.

The previous prime is 3665539. The next prime is 3665573. The reversal of 3665572 is 2755663.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 1028196 = 1624^2 + 1014^2 .

It is a d-powerful number, because it can be written as 3 + 6 + 6⁸ + 5 + 5⁹ + 7² + 2¹⁵ .

It is not an unprimeable number, because it can be changed into a prime (3665573) 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, 2797 + ... + 3892.

It is an arithmetic number, because the mean of its divisors is an integer number (538545).

Almost surely, 2^3665572 is an apocalyptic number.

It is an amenable number.

3665572 is a deficient number, since it is larger than the sum of its proper divisors (2796968).

3665572 is a wasteful number, since it uses less digits than its factorization.

3665572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6830 (or 6828 counting only the distinct ones).

The product of its digits is 37800, while the sum is 34.

The square root of 3665572 is about 1914.5683586647. The cubic root of 3665572 is about 154.1868199934.

Subtracting from 3665572 its reverse (2755663), we obtain a palindrome (909909).

The spelling of 3665572 in words is "three million, six hundred sixty-five thousand, five hundred seventy-two".