115240257 has 12 divisors (see below), whose sum is σ = 181590864. Its totient is φ = 69842520.

The previous prime is 115240253. The next prime is 115240259. The reversal of 115240257 is 752042511.

It is not a de Polignac number, because 115240257 - 2² = 115240253 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 115240257.

It is not an unprimeable number, because it can be changed into a prime (115240253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 581923 + ... + 582120.

It is an arithmetic number, because the mean of its divisors is an integer number (15132572).

Almost surely, 2^115240257 is an apocalyptic number.

It is an amenable number.

115240257 is a deficient number, since it is larger than the sum of its proper divisors (66350607).

115240257 is a wasteful number, since it uses less digits than its factorization.

115240257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164060 (or 1164057 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 115240257 is about 10735.0014904517. The cubic root of 115240257 is about 486.6328315648.

Adding to 115240257 its reverse (752042511), we get a palindrome (867282768).

The spelling of 115240257 in words is "one hundred fifteen million, two hundred forty thousand, two hundred fifty-seven".