115256257 has 4 divisors (see below), whose sum is σ = 115303300. Its totient is φ = 115209216.

The previous prime is 115256249. The next prime is 115256293. The reversal of 115256257 is 752652511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752652511 = 13 ⋅57896347.

It can be written as a sum of positive squares in 2 ways, for example, as 85673536 + 29582721 = 9256^2 + 5439^2 .

It is a cyclic number.

It is not a de Polignac number, because 115256257 - 2³ = 115256249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115259257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19632 + ... + 24817.

It is an arithmetic number, because the mean of its divisors is an integer number (28825825).

Almost surely, 2^115256257 is an apocalyptic number.

It is an amenable number.

115256257 is a deficient number, since it is larger than the sum of its proper divisors (47043).

115256257 is an equidigital number, since it uses as much as digits as its factorization.

115256257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47042.

The product of its digits is 21000, while the sum is 34.

The square root of 115256257 is about 10735.7466903798. The cubic root of 115256257 is about 486.6553519502.

The spelling of 115256257 in words is "one hundred fifteen million, two hundred fifty-six thousand, two hundred fifty-seven".