111520247 has 2 divisors, whose sum is σ = 111520248. Its totient is φ = 111520246.

The previous prime is 111520243. The next prime is 111520249. The reversal of 111520247 is 742025111.

It is a strong prime.

It is an emirp because it is prime and its reverse (742025111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111520247 - 2² = 111520243 is a prime.

Together with 111520249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111520243) 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 as a sum of consecutive naturals, namely, 55760123 + 55760124.

It is an arithmetic number, because the mean of its divisors is an integer number (55760124).

Almost surely, 2^111520247 is an apocalyptic number.

111520247 is a deficient number, since it is larger than the sum of its proper divisors (1).

111520247 is an equidigital number, since it uses as much as digits as its factorization.

111520247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 111520247 is about 10560.3147206890. The cubic root of 111520247 is about 481.3392100432.

Adding to 111520247 its reverse (742025111), we get a palindrome (853545358).

The spelling of 111520247 in words is "one hundred eleven million, five hundred twenty thousand, two hundred forty-seven".