1121839 has 2 divisors, whose sum is σ = 1121840. Its totient is φ = 1121838.

The previous prime is 1121837. The next prime is 1121867. The reversal of 1121839 is 9381211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121839 - 2¹ = 1121837 is a prime.

Together with 1121837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121831) 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, 560919 + 560920.

It is an arithmetic number, because the mean of its divisors is an integer number (560920).

2^1121839 is an apocalyptic number.

1121839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121839 is an equidigital number, since it uses as much as digits as its factorization.

1121839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 1121839 is about 1059.1690138972. The cubic root of 1121839 is about 103.9066902218.

The spelling of 1121839 in words is "one million, one hundred twenty-one thousand, eight hundred thirty-nine".