3645225 has 36 divisors (see below), whose sum is σ = 6920316. Its totient is φ = 1827840.

The previous prime is 3645193. The next prime is 3645227. The reversal of 3645225 is 5225463.

It can be written as a sum of positive squares in 6 ways, for example, as 4761 + 3640464 = 69^2 + 1908^2 .

It is not a de Polignac number, because 3645225 - 2⁵ = 3645193 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 6³ + 4² + 5⁶ + 2¹⁴ + 2¹⁶ + 5⁹ .

3645225 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3645227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3349 + ... + 4301.

It is an arithmetic number, because the mean of its divisors is an integer number (192231).

Almost surely, 2^3645225 is an apocalyptic number.

It is an amenable number.

3645225 is a deficient number, since it is larger than the sum of its proper divisors (3275091).

3645225 is a wasteful number, since it uses less digits than its factorization.

3645225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 978 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 3645225 is about 1909.2472338595. The cubic root of 3645225 is about 153.9010017579.

The spelling of 3645225 in words is "three million, six hundred forty-five thousand, two hundred twenty-five".