1821294 has 12 divisors (see below), whose sum is σ = 3946176. Its totient is φ = 607092.

The previous prime is 1821289. The next prime is 1821311. The reversal of 1821294 is 4921281.

It is a super-2 number, since 2×1821294² = 6634223668872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 50574 + ... + 50609.

It is an arithmetic number, because the mean of its divisors is an integer number (328848).

2^1821294 is an apocalyptic number.

1821294 is an abundant number, since it is smaller than the sum of its proper divisors (2124882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1821294 is a wasteful number, since it uses less digits than its factorization.

1821294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101191 (or 101188 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1821294 is about 1349.5532594159. The cubic root of 1821294 is about 122.1218436934.

It can be divided in two parts, 18 and 21294, that added together give a palindrome (21312).

The spelling of 1821294 in words is "one million, eight hundred twenty-one thousand, two hundred ninety-four".