11822539 has 4 divisors (see below), whose sum is σ = 11842624. Its totient is φ = 11802456.

The previous prime is 11822533. The next prime is 11822567. The reversal of 11822539 is 93522811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93522811 = 677 ⋅138143.

It is a cyclic number.

It is not a de Polignac number, because 11822539 - 2⁵ = 11822507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11822539.

It is not an unprimeable number, because it can be changed into a prime (11822533) 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 3 ways as a sum of consecutive naturals, for example, 9132 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (2960656).

Almost surely, 2^11822539 is an apocalyptic number.

11822539 is a deficient number, since it is larger than the sum of its proper divisors (20085).

11822539 is an equidigital number, since it uses as much as digits as its factorization.

11822539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20084.

The product of its digits is 4320, while the sum is 31.

The square root of 11822539 is about 3438.3919206513. The cubic root of 11822539 is about 227.8086716948.

It can be divided in two parts, 1182 and 2539, that added together give a square (3721 = 61²).

The spelling of 11822539 in words is "eleven million, eight hundred twenty-two thousand, five hundred thirty-nine".