1122890161 has 4 divisors (see below), whose sum is σ = 1138272292. Its totient is φ = 1107508032.

The previous prime is 1122890159. The next prime is 1122890189. The reversal of 1122890161 is 1610982211.

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 2 ways, for example, as 567392400 + 555497761 = 23820^2 + 23569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122890161 - 2¹ = 1122890159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122890191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690956 + ... + 7691101.

It is an arithmetic number, because the mean of its divisors is an integer number (284568073).

Almost surely, 2^1122890161 is an apocalyptic number.

It is an amenable number.

1122890161 is a deficient number, since it is larger than the sum of its proper divisors (15382131).

1122890161 is an equidigital number, since it uses as much as digits as its factorization.

1122890161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15382130.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 1122890161 is about 33509.5532796246. The cubic root of 1122890161 is about 1039.3913354756.

The spelling of 1122890161 in words is "one billion, one hundred twenty-two million, eight hundred ninety thousand, one hundred sixty-one".