115517249 has 2 divisors, whose sum is σ = 115517250. Its totient is φ = 115517248.

The previous prime is 115517243. The next prime is 115517251. The reversal of 115517249 is 942715511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92544400 + 22972849 = 9620^2 + 4793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115517249 is a prime.

Together with 115517251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115517243) 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, 57758624 + 57758625.

It is an arithmetic number, because the mean of its divisors is an integer number (57758625).

Almost surely, 2^115517249 is an apocalyptic number.

It is an amenable number.

115517249 is a deficient number, since it is larger than the sum of its proper divisors (1).

115517249 is an equidigital number, since it uses as much as digits as its factorization.

115517249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 35.

The square root of 115517249 is about 10747.8950962502. The cubic root of 115517249 is about 487.0224105543.

The spelling of 115517249 in words is "one hundred fifteen million, five hundred seventeen thousand, two hundred forty-nine".