1802243 has 4 divisors (see below), whose sum is σ = 1808688. Its totient is φ = 1795800.

The previous prime is 1802239. The next prime is 1802261. The reversal of 1802243 is 3422081.

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

It is a cyclic number.

It is not a de Polignac number, because 1802243 - 2² = 1802239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1802293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2783 + ... + 3368.

It is an arithmetic number, because the mean of its divisors is an integer number (452172).

2^1802243 is an apocalyptic number.

1802243 is a deficient number, since it is larger than the sum of its proper divisors (6445).

1802243 is an equidigital number, since it uses as much as digits as its factorization.

1802243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1802243 is about 1342.4764429963. The cubic root of 1802243 is about 121.6945462683.

The spelling of 1802243 in words is "one million, eight hundred two thousand, two hundred forty-three".