3645223 has 4 divisors (see below), whose sum is σ = 3649320. Its totient is φ = 3641128.

The previous prime is 3645193. The next prime is 3645227. The reversal of 3645223 is 3225463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3225463 = 83 ⋅38861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3645223 is a prime.

It is a d-powerful number, because it can be written as 3⁴ + 6⁸ + 4⁶ + 5⁹ + 2⁵ + 2¹³ + 3⁴ .

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 88 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (912330).

Almost surely, 2^3645223 is an apocalyptic number.

3645223 is a deficient number, since it is larger than the sum of its proper divisors (4097).

3645223 is a wasteful number, since it uses less digits than its factorization.

3645223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096.

The product of its digits is 4320, while the sum is 25.

The square root of 3645223 is about 1909.2467100928. The cubic root of 3645223 is about 153.9009736113.

The spelling of 3645223 in words is "three million, six hundred forty-five thousand, two hundred twenty-three".