1818243 has 48 divisors (see below), whose sum is σ = 3328000. Its totient is φ = 952560.

The previous prime is 1818241. The next prime is 1818277. The reversal of 1818243 is 3428181.

It is not a de Polignac number, because 1818243 - 2¹ = 1818241 is a prime.

It is a super-3 number, since 3×1818243³ = 18033375568390784721, which contains 333 as substring.

It is a Duffinian number.

1818243 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58638 + ... + 58668.

2^1818243 is an apocalyptic number.

1818243 is a deficient number, since it is larger than the sum of its proper divisors (1509757).

1818243 is a wasteful number, since it uses less digits than its factorization.

1818243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 60 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1818243 is about 1348.4224115610. The cubic root of 1818243 is about 122.0536134510.

It can be divided in two parts, 18182 and 43, that added together give a square (18225 = 135²).

The spelling of 1818243 in words is "one million, eight hundred eighteen thousand, two hundred forty-three".