1816122 has 32 divisors (see below), whose sum is σ = 4529664. Its totient is φ = 471600.

The previous prime is 1816121. The next prime is 1816141. The reversal of 1816122 is 2216181.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1816121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1504 + ... + 2427.

It is an arithmetic number, because the mean of its divisors is an integer number (141552).

2^1816122 is an apocalyptic number.

1816122 is an abundant number, since it is smaller than the sum of its proper divisors (2713542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816122 is a wasteful number, since it uses less digits than its factorization.

1816122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954.

The product of its digits is 192, while the sum is 21.

The square root of 1816122 is about 1347.6357074521. The cubic root of 1816122 is about 122.0061360347.

The spelling of 1816122 in words is "one million, eight hundred sixteen thousand, one hundred twenty-two".