1800122 has 4 divisors (see below), whose sum is σ = 2700186. Its totient is φ = 900060.

The previous prime is 1800121. The next prime is 1800137. The reversal of 1800122 is 2210081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1771561 + 28561 = 1331^2 + 169^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1800097 and 1800106.

It is not an unprimeable number, because it can be changed into a prime (1800121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450029 + ... + 450032.

2^1800122 is an apocalyptic number.

1800122 is a deficient number, since it is larger than the sum of its proper divisors (900064).

1800122 is an equidigital number, since it uses as much as digits as its factorization.

1800122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900063.

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

The square root of 1800122 is about 1341.6862524450. The cubic root of 1800122 is about 121.6467881036.

The spelling of 1800122 in words is "one million, eight hundred thousand, one hundred twenty-two".