1122891 has 16 divisors (see below), whose sum is σ = 1867008. Its totient is φ = 583200.

The previous prime is 1122887. The next prime is 1122899. The reversal of 1122891 is 1982211.

It is not a de Polignac number, because 1122891 - 2² = 1122887 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1122899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2200 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (116688).

2^1122891 is an apocalyptic number.

1122891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1122891 is a deficient number, since it is larger than the sum of its proper divisors (744117).

1122891 is a wasteful number, since it uses less digits than its factorization.

1122891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882.

The product of its digits is 288, while the sum is 24.

The square root of 1122891 is about 1059.6655132635. The cubic root of 1122891 is about 103.9391594346.

It can be divided in two parts, 112 and 2891, that added together give a palindrome (3003).

The spelling of 1122891 in words is "one million, one hundred twenty-two thousand, eight hundred ninety-one".