1122818 has 4 divisors (see below), whose sum is σ = 1684230. Its totient is φ = 561408.

The previous prime is 1122811. The next prime is 1122841. The reversal of 1122818 is 8182211.

It is a happy number.

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., 1087849 + 34969 = 1043^2 + 187^2 .

It is a super-2 number, since 2×1122818² = 2521440522248, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122793 and 1122802.

It is not an unprimeable number, because it can be changed into a prime (1122811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280703 + ... + 280706.

2^1122818 is an apocalyptic number.

1122818 is a deficient number, since it is larger than the sum of its proper divisors (561412).

1122818 is an equidigital number, since it uses as much as digits as its factorization.

1122818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561411.

The product of its digits is 256, while the sum is 23.

The square root of 1122818 is about 1059.6310678722. The cubic root of 1122818 is about 103.9369069978.

The spelling of 1122818 in words is "one million, one hundred twenty-two thousand, eight hundred eighteen".