1801222 has 8 divisors (see below), whose sum is σ = 2819376. Its totient is φ = 861432.

The previous prime is 1801213. The next prime is 1801223. The reversal of 1801222 is 2221081.

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

It is a junction number, because it is equal to n+sod(n) for n = 1801196 and 1801205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19533 + ... + 19624.

It is an arithmetic number, because the mean of its divisors is an integer number (352422).

2^1801222 is an apocalyptic number.

1801222 is a deficient number, since it is larger than the sum of its proper divisors (1018154).

1801222 is a wasteful number, since it uses less digits than its factorization.

1801222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39182.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1801222 is about 1342.0961217439. The cubic root of 1801222 is about 121.6715612801.

The spelling of 1801222 in words is "one million, eight hundred one thousand, two hundred twenty-two".