115717145 has 4 divisors (see below), whose sum is σ = 138860580. Its totient is φ = 92573712.

The previous prime is 115717103. The next prime is 115717207. The reversal of 115717145 is 541717511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40998409 + 74718736 = 6403^2 + 8644^2 .

It is a cyclic number.

It is not a de Polignac number, because 115717145 - 2⁸ = 115716889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11571710 + ... + 11571719.

It is an arithmetic number, because the mean of its divisors is an integer number (34715145).

Almost surely, 2^115717145 is an apocalyptic number.

It is an amenable number.

115717145 is a deficient number, since it is larger than the sum of its proper divisors (23143435).

115717145 is an equidigital number, since it uses as much as digits as its factorization.

115717145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23143434.

The product of its digits is 4900, while the sum is 32.

The square root of 115717145 is about 10757.1903859697. The cubic root of 115717145 is about 487.3031701564.

The spelling of 115717145 in words is "one hundred fifteen million, seven hundred seventeen thousand, one hundred forty-five".