3621563 has 4 divisors (see below), whose sum is σ = 3950808. Its totient is φ = 3292320.

The previous prime is 3621559. The next prime is 3621577. The reversal of 3621563 is 3651263.

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

It is a cyclic number.

It is not a de Polignac number, because 3621563 - 2² = 3621559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3621593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164606 + ... + 164627.

It is an arithmetic number, because the mean of its divisors is an integer number (987702).

Almost surely, 2^3621563 is an apocalyptic number.

3621563 is a deficient number, since it is larger than the sum of its proper divisors (329245).

3621563 is a wasteful number, since it uses less digits than its factorization.

3621563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329244.

The product of its digits is 3240, while the sum is 26.

The square root of 3621563 is about 1903.0404619976. The cubic root of 3621563 is about 153.5672762636.

The spelling of 3621563 in words is "three million, six hundred twenty-one thousand, five hundred sixty-three".