115851247 has 4 divisors (see below), whose sum is σ = 119588416. Its totient is φ = 112114080.

The previous prime is 115851223. The next prime is 115851251. The reversal of 115851247 is 742158511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115851247 - 2⁷ = 115851119 is a prime.

It is a super-2 number, since 2×115851247² = 26843022862910018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115851217) 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, 1868538 + ... + 1868599.

It is an arithmetic number, because the mean of its divisors is an integer number (29897104).

Almost surely, 2^115851247 is an apocalyptic number.

115851247 is a deficient number, since it is larger than the sum of its proper divisors (3737169).

115851247 is an equidigital number, since it uses as much as digits as its factorization.

115851247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737168.

The product of its digits is 11200, while the sum is 34.

The square root of 115851247 is about 10763.4217143063. The cubic root of 115851247 is about 487.4913390528.

The spelling of 115851247 in words is "one hundred fifteen million, eight hundred fifty-one thousand, two hundred forty-seven".