1821802 has 8 divisors (see below), whose sum is σ = 2779200. Its totient is φ = 895404.

The previous prime is 1821791. The next prime is 1821821. The reversal of 1821802 is 2081281.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7602 + ... + 7837.

It is an arithmetic number, because the mean of its divisors is an integer number (347400).

2^1821802 is an apocalyptic number.

1821802 is a deficient number, since it is larger than the sum of its proper divisors (957398).

1821802 is a wasteful number, since it uses less digits than its factorization.

1821802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1821802 is about 1349.7414567242. The cubic root of 1821802 is about 122.1331968173.

The spelling of 1821802 in words is "one million, eight hundred twenty-one thousand, eight hundred two".