115281289 has 2 divisors, whose sum is σ = 115281290. Its totient is φ = 115281288.

The previous prime is 115281247. The next prime is 115281337. The reversal of 115281289 is 982182511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100902025 + 14379264 = 10045^2 + 3792^2 .

It is a cyclic number.

It is not a de Polignac number, because 115281289 - 2⁷ = 115281161 is a prime.

It is a Chen prime.

It is equal to p_6587803 and since 115281289 and 6587803 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (115281239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57640644 + 57640645.

It is an arithmetic number, because the mean of its divisors is an integer number (57640645).

Almost surely, 2^115281289 is an apocalyptic number.

It is an amenable number.

115281289 is a deficient number, since it is larger than the sum of its proper divisors (1).

115281289 is an equidigital number, since it uses as much as digits as its factorization.

115281289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 37.

The square root of 115281289 is about 10736.9124519109. The cubic root of 115281289 is about 486.6905809124.

The spelling of 115281289 in words is "one hundred fifteen million, two hundred eighty-one thousand, two hundred eighty-nine".