3645562 has 4 divisors (see below), whose sum is σ = 5468346. Its totient is φ = 1822780.

The previous prime is 3645559. The next prime is 3645563. The reversal of 3645562 is 2655463.

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

It can be written as a sum of positive squares in only one way, i.e., 3530641 + 114921 = 1879^2 + 339^2 .

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 not an unprimeable number, because it can be changed into a prime (3645563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911389 + ... + 911392.

Almost surely, 2^3645562 is an apocalyptic number.

3645562 is a deficient number, since it is larger than the sum of its proper divisors (1822784).

3645562 is a wasteful number, since it uses less digits than its factorization.

3645562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822783.

The product of its digits is 21600, while the sum is 31.

The square root of 3645562 is about 1909.3354864979. The cubic root of 3645562 is about 153.9057443128.

Subtracting from 3645562 its reverse (2655463), we obtain a palindrome (990099).

The spelling of 3645562 in words is "three million, six hundred forty-five thousand, five hundred sixty-two".