3645441 has 6 divisors (see below), whose sum is σ = 5265650. Its totient is φ = 2430288.

The previous prime is 3645419. The next prime is 3645449. The reversal of 3645441 is 1445463.

It can be written as a sum of positive squares in only one way, i.e., 3594816 + 50625 = 1896^2 + 225^2 .

It is not a de Polignac number, because 3645441 - 2⁵ = 3645409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3645449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202516 + ... + 202533.

It is a Proth number, since it is equal to 445 ⋅ 2¹³ + 1 and 445 < 2¹³.

Almost surely, 2^3645441 is an apocalyptic number.

It is an amenable number.

3645441 is a deficient number, since it is larger than the sum of its proper divisors (1620209).

3645441 is a wasteful number, since it uses less digits than its factorization.

3645441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405055 (or 405052 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 3645441 is about 1909.3037998181. The cubic root of 3645441 is about 153.9040415300.

The spelling of 3645441 in words is "three million, six hundred forty-five thousand, four hundred forty-one".