1122889 has 4 divisors (see below), whose sum is σ = 1128960. Its totient is φ = 1116820.

The previous prime is 1122887. The next prime is 1122899. The reversal of 1122889 is 9882211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9882211 = 31 ⋅318781.

It is a cyclic number.

It is not a de Polignac number, because 1122889 - 2¹ = 1122887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10 and base 16.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 1122889.

It is not an unprimeable number, because it can be changed into a prime (1122887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749 + ... + 3130.

It is an arithmetic number, because the mean of its divisors is an integer number (282240).

2^1122889 is an apocalyptic number.

It is an amenable number.

1122889 is a deficient number, since it is larger than the sum of its proper divisors (6071).

1122889 is an equidigital number, since it uses as much as digits as its factorization.

1122889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6070.

The product of its digits is 2304, while the sum is 31.

The square root of 1122889 is about 1059.6645695691. The cubic root of 1122889 is about 103.9390977253.

The spelling of 1122889 in words is "one million, one hundred twenty-two thousand, eight hundred eighty-nine".