1139823 has 12 divisors (see below), whose sum is σ = 1666080. Its totient is φ = 750816.

The previous prime is 1139819. The next prime is 1139843. The reversal of 1139823 is 3289311.

It is not a de Polignac number, because 1139823 - 2² = 1139819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139843) 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 in 11 ways as a sum of consecutive naturals, for example, 90 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (138840).

2^1139823 is an apocalyptic number.

1139823 is a deficient number, since it is larger than the sum of its proper divisors (526257).

1139823 is a wasteful number, since it uses less digits than its factorization.

1139823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1515 counting only the distinct ones).

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

The square root of 1139823 is about 1067.6249341412. The cubic root of 1139823 is about 104.4589859119.

The spelling of 1139823 in words is "one million, one hundred thirty-nine thousand, eight hundred twenty-three".