115242409 has 2 divisors, whose sum is σ = 115242410. Its totient is φ = 115242408.

The previous prime is 115242373. The next prime is 115242419. The reversal of 115242409 is 904242511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104040000 + 11202409 = 10200^2 + 3347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115242409 is a prime.

It is not a weakly prime, because it can be changed into another prime (115242419) 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 as a sum of consecutive naturals, namely, 57621204 + 57621205.

It is an arithmetic number, because the mean of its divisors is an integer number (57621205).

Almost surely, 2^115242409 is an apocalyptic number.

It is an amenable number.

115242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

115242409 is an equidigital number, since it uses as much as digits as its factorization.

115242409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 115242409 is about 10735.1017228529. The cubic root of 115242409 is about 486.6358606780.

The spelling of 115242409 in words is "one hundred fifteen million, two hundred forty-two thousand, four hundred nine".