1123539 has 8 divisors (see below), whose sum is σ = 1505280. Its totient is φ = 745416.

The previous prime is 1123531. The next prime is 1123541. The reversal of 1123539 is 9353211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123539 - 2³ = 1123531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (188160).

2^1123539 is an apocalyptic number.

1123539 is a deficient number, since it is larger than the sum of its proper divisors (381741).

1123539 is a wasteful number, since it uses less digits than its factorization.

1123539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its digits is 810, while the sum is 24.

The square root of 1123539 is about 1059.9712260246. The cubic root of 1123539 is about 103.9591493901.

The spelling of 1123539 in words is "one million, one hundred twenty-three thousand, five hundred thirty-nine".