1801022 has 4 divisors (see below), whose sum is σ = 2701536. Its totient is φ = 900510.

The previous prime is 1801021. The next prime is 1801039. The reversal of 1801022 is 2201081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2201081 = 197 ⋅11173.

It is a junction number, because it is equal to n+sod(n) for n = 1800988 and 1801006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450254 + ... + 450257.

It is an arithmetic number, because the mean of its divisors is an integer number (675384).

2^1801022 is an apocalyptic number.

1801022 is a deficient number, since it is larger than the sum of its proper divisors (900514).

1801022 is an equidigital number, since it uses as much as digits as its factorization.

1801022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900513.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1801022 is about 1342.0216093640. The cubic root of 1801022 is about 121.6670578166.

The spelling of 1801022 in words is "one million, eight hundred one thousand, twenty-two".