1821922 has 8 divisors (see below), whose sum is σ = 2851776. Its totient is φ = 871332.

The previous prime is 1821913. The next prime is 1821923. The reversal of 1821922 is 2291281.

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

It is not an unprimeable number, because it can be changed into a prime (1821923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19758 + ... + 19849.

It is an arithmetic number, because the mean of its divisors is an integer number (356472).

2^1821922 is an apocalyptic number.

1821922 is a deficient number, since it is larger than the sum of its proper divisors (1029854).

1821922 is a wasteful number, since it uses less digits than its factorization.

1821922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39632.

The product of its digits is 576, while the sum is 25.

The square root of 1821922 is about 1349.7859089500. The cubic root of 1821922 is about 122.1358783495.

The spelling of 1821922 in words is "one million, eight hundred twenty-one thousand, nine hundred twenty-two".