3621025 has 12 divisors (see below), whose sum is σ = 4516204. Its totient is φ = 2880000.

The previous prime is 3621011. The next prime is 3621031. The reversal of 3621025 is 5201263.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 112896 + 3508129 = 336^2 + 1873^2 .

It is not a de Polignac number, because 3621025 - 2⁵ = 3620993 is a prime.

It is a super-2 number, since 2×3621025² = 26223644101250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

3621025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3620993 and 3621011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5725 + ... + 6325.

Almost surely, 2^3621025 is an apocalyptic number.

It is an amenable number.

3621025 is a deficient number, since it is larger than the sum of its proper divisors (895179).

3621025 is a wasteful number, since it uses less digits than its factorization.

3621025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 3621025 is about 1902.8991039989. The cubic root of 3621025 is about 153.5596715097.

Adding to 3621025 its reverse (5201263), we get a palindrome (8822288).

It can be divided in two parts, 36 and 21025, that multiplied together give a square (756900 = 870²).

The spelling of 3621025 in words is "three million, six hundred twenty-one thousand, twenty-five".