115248781 has 2 divisors, whose sum is σ = 115248782. Its totient is φ = 115248780.

The previous prime is 115248779. The next prime is 115248799. The reversal of 115248781 is 187842511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79655625 + 35593156 = 8925^2 + 5966^2 .

It is an emirp because it is prime and its reverse (187842511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115248781 - 2¹ = 115248779 is a prime.

It is a super-2 number, since 2×115248781² = 26564563043971922, which contains 22 as substring.

Together with 115248779, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 115248781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115248751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57624390 + 57624391.

It is an arithmetic number, because the mean of its divisors is an integer number (57624391).

Almost surely, 2^115248781 is an apocalyptic number.

It is an amenable number.

115248781 is a deficient number, since it is larger than the sum of its proper divisors (1).

115248781 is an equidigital number, since it uses as much as digits as its factorization.

115248781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 37.

The square root of 115248781 is about 10735.3985021517. The cubic root of 115248781 is about 486.6448295596.

The spelling of 115248781 in words is "one hundred fifteen million, two hundred forty-eight thousand, seven hundred eighty-one".