1812022 has 4 divisors (see below), whose sum is σ = 2718036. Its totient is φ = 906010.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812022 is 2202181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2202181 = 23 ⋅95747.

It is a junction number, because it is equal to n+sod(n) for n = 1811987 and 1812005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453004 + ... + 453007.

It is an arithmetic number, because the mean of its divisors is an integer number (679509).

2^1812022 is an apocalyptic number.

1812022 is a deficient number, since it is larger than the sum of its proper divisors (906014).

1812022 is an equidigital number, since it uses as much as digits as its factorization.

1812022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906013.

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

The square root of 1812022 is about 1346.1136653344. The cubic root of 1812022 is about 121.9142548983.

It can be divided in two parts, 181202 and 2, that multiplied together give a square (362404 = 602²).

The spelling of 1812022 in words is "one million, eight hundred twelve thousand, twenty-two".