112821539 has 4 divisors (see below), whose sum is σ = 112845480. Its totient is φ = 112797600.

The previous prime is 112821491. The next prime is 112821581. The reversal of 112821539 is 935128211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 112821539 - 2⁸ = 112821283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112821589) 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, 2294 + ... + 15195.

It is an arithmetic number, because the mean of its divisors is an integer number (28211370).

Almost surely, 2^112821539 is an apocalyptic number.

112821539 is a deficient number, since it is larger than the sum of its proper divisors (23941).

112821539 is an equidigital number, since it uses as much as digits as its factorization.

112821539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23940.

The product of its digits is 4320, while the sum is 32.

The square root of 112821539 is about 10621.7483965682. The cubic root of 112821539 is about 483.2041696345.

It can be divided in two parts, 11282 and 1539, that added together give a palindrome (12821).

The spelling of 112821539 in words is "one hundred twelve million, eight hundred twenty-one thousand, five hundred thirty-nine".