1836545 has 4 divisors (see below), whose sum is σ = 2203860. Its totient is φ = 1469232.

The previous prime is 1836539. The next prime is 1836553. The reversal of 1836545 is 5456381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200704 + 1635841 = 448^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1836545 - 2¹⁸ = 1574401 is a prime.

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

It is a Curzon 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, 183650 + ... + 183659.

It is an arithmetic number, because the mean of its divisors is an integer number (550965).

2^1836545 is an apocalyptic number.

It is an amenable number.

1836545 is a deficient number, since it is larger than the sum of its proper divisors (367315).

1836545 is an equidigital number, since it uses as much as digits as its factorization.

1836545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367314.

The product of its digits is 14400, while the sum is 32.

The square root of 1836545 is about 1355.1918683345. The cubic root of 1836545 is about 122.4617678830.

It can be divided in two parts, 18 and 36545, that added together give a palindrome (36563).

The spelling of 1836545 in words is "one million, eight hundred thirty-six thousand, five hundred forty-five".