3624021 has 10 divisors (see below), whose sum is σ = 5413782. Its totient is φ = 2415960.

The previous prime is 3624013. The next prime is 3624059. The reversal of 3624021 is 1204263.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 1703025 = 1386^2 + 1305^2 .

It is not a de Polignac number, because 3624021 - 2³ = 3624013 is a prime.

3624021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3623985 and 3624003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3624001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22290 + ... + 22451.

Almost surely, 2^3624021 is an apocalyptic number.

It is an amenable number.

3624021 is a deficient number, since it is larger than the sum of its proper divisors (1789761).

3624021 is an equidigital number, since it uses as much as digits as its factorization.

3624021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44753 (or 44744 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3624021 is about 1903.6861611095. The cubic root of 3624021 is about 153.6020110821.

Adding to 3624021 its reverse (1204263), we get a palindrome (4828284).

The spelling of 3624021 in words is "three million, six hundred twenty-four thousand, twenty-one".