115357257 has 16 divisors (see below), whose sum is σ = 180953280. Its totient is φ = 72380736.

The previous prime is 115357247. The next prime is 115357267. The reversal of 115357257 is 752753511.

It is a happy number.

115357257 is a `hidden beast` number, since 1 + 1 + 535 + 72 + 57 = 666.

It is an interprime number because it is at equal distance from previous prime (115357247) and next prime (115357267).

It is not a de Polignac number, because 115357257 - 2⁴ = 115357241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115357237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125203 + ... + 126120.

It is an arithmetic number, because the mean of its divisors is an integer number (11309580).

Almost surely, 2^115357257 is an apocalyptic number.

115357257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

115357257 is a deficient number, since it is larger than the sum of its proper divisors (65596023).

115357257 is a wasteful number, since it uses less digits than its factorization.

115357257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251349 (or 251343 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 115357257 is about 10740.4495715962. The cubic root of 115357257 is about 486.7974638011.

The spelling of 115357257 in words is "one hundred fifteen million, three hundred fifty-seven thousand, two hundred fifty-seven".