1836365 has 4 divisors (see below), whose sum is σ = 2203644. Its totient is φ = 1469088.

The previous prime is 1836319. The next prime is 1836379. The reversal of 1836365 is 5636381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5636381 = 47 ⋅119923.

It can be written as a sum of positive squares in 2 ways, for example, as 465124 + 1371241 = 682^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 1836365 - 2⁶ = 1836301 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183632 + ... + 183641.

It is an arithmetic number, because the mean of its divisors is an integer number (550911).

2^1836365 is an apocalyptic number.

It is an amenable number.

1836365 is a deficient number, since it is larger than the sum of its proper divisors (367279).

1836365 is an equidigital number, since it uses as much as digits as its factorization.

1836365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367278.

The product of its digits is 12960, while the sum is 32.

The square root of 1836365 is about 1355.1254554468. The cubic root of 1836365 is about 122.4577669213.

The spelling of 1836365 in words is "one million, eight hundred thirty-six thousand, three hundred sixty-five".