3621859 has 4 divisors (see below), whose sum is σ = 3625720. Its totient is φ = 3618000.

The previous prime is 3621857. The next prime is 3621881. The reversal of 3621859 is 9581263.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3621859 - 2¹ = 3621857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3621851) 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, 484 + ... + 2734.

It is an arithmetic number, because the mean of its divisors is an integer number (906430).

Almost surely, 2^3621859 is an apocalyptic number.

3621859 is a deficient number, since it is larger than the sum of its proper divisors (3861).

3621859 is a wasteful number, since it uses less digits than its factorization.

3621859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860.

The product of its digits is 12960, while the sum is 34.

The square root of 3621859 is about 1903.1182306940. The cubic root of 3621859 is about 153.5714599706.

The spelling of 3621859 in words is "three million, six hundred twenty-one thousand, eight hundred fifty-nine".