115037561 has 8 divisors (see below), whose sum is σ = 117300360. Its totient is φ = 112793472.

The previous prime is 115037539. The next prime is 115037579. The reversal of 115037561 is 165730511.

It can be written as a sum of positive squares in 4 ways, for example, as 21335161 + 93702400 = 4619^2 + 9680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115037561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115037501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8075 + ... + 17183.

It is an arithmetic number, because the mean of its divisors is an integer number (14662545).

Almost surely, 2^115037561 is an apocalyptic number.

It is an amenable number.

115037561 is a deficient number, since it is larger than the sum of its proper divisors (2262799).

115037561 is an equidigital number, since it uses as much as digits as its factorization.

115037561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9355.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 115037561 is about 10725.5564424416. The cubic root of 115037561 is about 486.3473514172.

The spelling of 115037561 in words is "one hundred fifteen million, thirty-seven thousand, five hundred sixty-one".