112721281 has 4 divisors (see below), whose sum is σ = 118654000. Its totient is φ = 106788564.

The previous prime is 112721267. The next prime is 112721293. The reversal of 112721281 is 182127211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 112721281 - 2⁵ = 112721249 is a prime.

It is a super-2 number, since 2×112721281² = 25412174380561922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112721251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966331 + ... + 2966368.

It is an arithmetic number, because the mean of its divisors is an integer number (29663500).

Almost surely, 2^112721281 is an apocalyptic number.

It is an amenable number.

112721281 is a deficient number, since it is larger than the sum of its proper divisors (5932719).

112721281 is an equidigital number, since it uses as much as digits as its factorization.

112721281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932718.

The product of its digits is 448, while the sum is 25.

The square root of 112721281 is about 10617.0278797788. The cubic root of 112721281 is about 483.0609953161.

Adding to 112721281 its reverse (182127211), we get a palindrome (294848492).

The spelling of 112721281 in words is "one hundred twelve million, seven hundred twenty-one thousand, two hundred eighty-one".