115127561 has 4 divisors (see below), whose sum is σ = 115156224. Its totient is φ = 115098900.

The previous prime is 115127543. The next prime is 115127603. The reversal of 115127561 is 165721511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115127561 - 2¹⁰ = 115126537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115127531) 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, 7085 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (28789056).

Almost surely, 2^115127561 is an apocalyptic number.

It is an amenable number.

115127561 is a deficient number, since it is larger than the sum of its proper divisors (28663).

115127561 is an equidigital number, since it uses as much as digits as its factorization.

115127561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28662.

The product of its digits is 2100, while the sum is 29.

The square root of 115127561 is about 10729.7512086721. The cubic root of 115127561 is about 486.4741501524.

The spelling of 115127561 in words is "one hundred fifteen million, one hundred twenty-seven thousand, five hundred sixty-one".