3645161 has 6 divisors (see below), whose sum is σ = 3947310. Its totient is φ = 3364608.

The previous prime is 3645151. The next prime is 3645193. The reversal of 3645161 is 1615463.

It can be written as a sum of positive squares in 3 ways, for example, as 336400 + 3308761 = 580^2 + 1819^2 .

It is not a de Polignac number, because 3645161 - 2¹⁴ = 3628777 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3645161.

It is not an unprimeable number, because it can be changed into a prime (3645101) 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, 10616 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (657885).

Almost surely, 2^3645161 is an apocalyptic number.

It is an amenable number.

3645161 is a deficient number, since it is larger than the sum of its proper divisors (302149).

3645161 is a wasteful number, since it uses less digits than its factorization.

3645161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21595 (or 21582 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 3645161 is about 1909.2304732536. The cubic root of 3645161 is about 153.9001010616.

The spelling of 3645161 in words is "three million, six hundred forty-five thousand, one hundred sixty-one".