1122281 has 2 divisors, whose sum is σ = 1122282. Its totient is φ = 1122280.

The previous prime is 1122269. The next prime is 1122283. The reversal of 1122281 is 1822211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 384400 = 859^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122281 - 2¹⁰ = 1121257 is a prime.

It is a super-2 number, since 2×1122281² = 2519029285922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1122283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1122283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561140 + 561141.

It is an arithmetic number, because the mean of its divisors is an integer number (561141).

2^1122281 is an apocalyptic number.

It is an amenable number.

1122281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122281 is an equidigital number, since it uses as much as digits as its factorization.

1122281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

The square root of 1122281 is about 1059.3776474893. The cubic root of 1122281 is about 103.9203347010.

Adding to 1122281 its reverse (1822211), we get a palindrome (2944492).

The spelling of 1122281 in words is "one million, one hundred twenty-two thousand, two hundred eighty-one".