3621225 has 24 divisors (see below), whose sum is σ = 6106752. Its totient is φ = 1892800.

The previous prime is 3621223. The next prime is 3621239. The reversal of 3621225 is 5221263.

3621225 = 440² + 441² + ... + 457².

3621225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3621225 - 2¹ = 3621223 is a prime.

It is a super-2 number, since 2×3621225² = 26226541001250, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3520 + ... + 4430.

It is an arithmetic number, because the mean of its divisors is an integer number (254448).

Almost surely, 2^3621225 is an apocalyptic number.

It is an amenable number.

3621225 is a deficient number, since it is larger than the sum of its proper divisors (2485527).

3621225 is a wasteful number, since it uses less digits than its factorization.

3621225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 972 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 3621225 is about 1902.9516546670. The cubic root of 3621225 is about 153.5624986437.

Adding to 3621225 its reverse (5221263), we get a palindrome (8842488).

The spelling of 3621225 in words is "three million, six hundred twenty-one thousand, two hundred twenty-five".