3621513 has 16 divisors (see below), whose sum is σ = 5697536. Its totient is φ = 2002320.

The previous prime is 3621481. The next prime is 3621517. The reversal of 3621513 is 3151263.

It is not a de Polignac number, because 3621513 - 2⁵ = 3621481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3621513.

It is not an unprimeable number, because it can be changed into a prime (3621517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131 + ... + 3432.

It is an arithmetic number, because the mean of its divisors is an integer number (356096).

Almost surely, 2^3621513 is an apocalyptic number.

It is an amenable number.

3621513 is a deficient number, since it is larger than the sum of its proper divisors (2076023).

3621513 is a wasteful number, since it uses less digits than its factorization.

3621513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604.

The product of its digits is 540, while the sum is 21.

The square root of 3621513 is about 1903.0273250797. The cubic root of 3621513 is about 153.5665695339.

Adding to 3621513 its reverse (3151263), we get a palindrome (6772776).

The spelling of 3621513 in words is "three million, six hundred twenty-one thousand, five hundred thirteen".