3621439 has 4 divisors (see below), whose sum is σ = 3667360. Its totient is φ = 3575520.

The previous prime is 3621403. The next prime is 3621461. The reversal of 3621439 is 9341263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9341263 = 2647 ⋅3529.

It is a cyclic number.

It is not a de Polignac number, because 3621439 - 2¹⁷ = 3490367 is a prime.

It is a super-2 number, since 2×3621439² = 26229640861442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621469) 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, 22842 + ... + 22999.

It is an arithmetic number, because the mean of its divisors is an integer number (916840).

Almost surely, 2^3621439 is an apocalyptic number.

3621439 is a deficient number, since it is larger than the sum of its proper divisors (45921).

3621439 is an equidigital number, since it uses as much as digits as its factorization.

3621439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45920.

The product of its digits is 3888, while the sum is 28.

The square root of 3621439 is about 1903.0078822748. The cubic root of 3621439 is about 153.5655235619.

The spelling of 3621439 in words is "three million, six hundred twenty-one thousand, four hundred thirty-nine".