1121899 has 2 divisors, whose sum is σ = 1121900. Its totient is φ = 1121898.

The previous prime is 1121867. The next prime is 1121933. The reversal of 1121899 is 9981211.

It is a weak prime.

It is an emirp because it is prime and its reverse (9981211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121899 - 2⁵ = 1121867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121899.

It is not a weakly prime, because it can be changed into another prime (1121819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560949 + 560950.

It is an arithmetic number, because the mean of its divisors is an integer number (560950).

2^1121899 is an apocalyptic number.

1121899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121899 is an equidigital number, since it uses as much as digits as its factorization.

1121899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The square root of 1121899 is about 1059.1973376099. The cubic root of 1121899 is about 103.9085426238.

The spelling of 1121899 in words is "one million, one hundred twenty-one thousand, eight hundred ninety-nine".