111442481 has 2 divisors, whose sum is σ = 111442482. Its totient is φ = 111442480.

The previous prime is 111442459. The next prime is 111442511. The reversal of 111442481 is 184244111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100320256 + 11122225 = 10016^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 111442481 - 2⁶ = 111442417 is a prime.

It is a super-2 number, since 2×111442481² = 24838853142870722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111442481.

It is not a weakly prime, because it can be changed into another prime (111442081) 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 as a sum of consecutive naturals, namely, 55721240 + 55721241.

It is an arithmetic number, because the mean of its divisors is an integer number (55721241).

Almost surely, 2^111442481 is an apocalyptic number.

It is an amenable number.

111442481 is a deficient number, since it is larger than the sum of its proper divisors (1).

111442481 is an equidigital number, since it uses as much as digits as its factorization.

111442481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 111442481 is about 10556.6320860396. The cubic root of 111442481 is about 481.2273005316.

Adding to 111442481 its reverse (184244111), we get a palindrome (295686592).

The spelling of 111442481 in words is "one hundred eleven million, four hundred forty-two thousand, four hundred eighty-one".