115045561 has 4 divisors (see below), whose sum is σ = 115124724. Its totient is φ = 114966400.

The previous prime is 115045559. The next prime is 115045577. The reversal of 115045561 is 165540511.

It is a happy number.

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 38378025 + 76667536 = 6195^2 + 8756^2 .

It is a cyclic number.

It is not a de Polignac number, because 115045561 - 2¹ = 115045559 is a prime.

It is a super-2 number, since 2×115045561² = 26470962211609442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115045501) 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 3 ways as a sum of consecutive naturals, for example, 37360 + ... + 40321.

It is an arithmetic number, because the mean of its divisors is an integer number (28781181).

Almost surely, 2^115045561 is an apocalyptic number.

It is an amenable number.

115045561 is a deficient number, since it is larger than the sum of its proper divisors (79163).

115045561 is an equidigital number, since it uses as much as digits as its factorization.

115045561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79162.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 115045561 is about 10725.9293769817. The cubic root of 115045561 is about 486.3586250933.

The spelling of 115045561 in words is "one hundred fifteen million, forty-five thousand, five hundred sixty-one".