3645361 has 4 divisors (see below), whose sum is σ = 3859812. Its totient is φ = 3430912.

The previous prime is 3645349. The next prime is 3645371. The reversal of 3645361 is 1635463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1635463 = 19 ⋅86077.

It can be written as a sum of positive squares in 2 ways, for example, as 3400336 + 245025 = 1844^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645361 - 2¹³ = 3637169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645371) 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, 107200 + ... + 107233.

It is an arithmetic number, because the mean of its divisors is an integer number (964953).

Almost surely, 2^3645361 is an apocalyptic number.

It is an amenable number.

3645361 is a deficient number, since it is larger than the sum of its proper divisors (214451).

3645361 is a wasteful number, since it uses less digits than its factorization.

3645361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214450.

The product of its digits is 6480, while the sum is 28.

The square root of 3645361 is about 1909.2828496585. The cubic root of 3645361 is about 153.9029157025.

The spelling of 3645361 in words is "three million, six hundred forty-five thousand, three hundred sixty-one".