3645572 has 12 divisors (see below), whose sum is σ = 7291200. Its totient is φ = 1562376.

The previous prime is 3645571. The next prime is 3645581. The reversal of 3645572 is 2755463.

3645572 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3645571) 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, 65072 + ... + 65127.

It is an arithmetic number, because the mean of its divisors is an integer number (607600).

Almost surely, 2^3645572 is an apocalyptic number.

It is an amenable number.

3645572 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645572 is a wasteful number, since it uses less digits than its factorization.

3645572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130210 (or 130208 counting only the distinct ones).

The product of its digits is 25200, while the sum is 32.

The square root of 3645572 is about 1909.3381052082. The cubic root of 3645572 is about 153.9058850370.

The spelling of 3645572 in words is "three million, six hundred forty-five thousand, five hundred seventy-two".