1123839 has 12 divisors (see below), whose sum is σ = 1634256. Its totient is φ = 744192.

The previous prime is 1123807. The next prime is 1123841. The reversal of 1123839 is 9383211.

It is not a de Polignac number, because 1123839 - 2⁵ = 1123807 is a prime.

1123839 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1414 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (136188).

2^1123839 is an apocalyptic number.

1123839 is a deficient number, since it is larger than the sum of its proper divisors (510417).

1123839 is a wasteful number, since it uses less digits than its factorization.

1123839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 843 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1123839 is about 1060.1127298547. The cubic root of 1123839 is about 103.9684013963.

The spelling of 1123839 in words is "one million, one hundred twenty-three thousand, eight hundred thirty-nine".