115603 has 2 divisors, whose sum is σ = 115604. Its totient is φ = 115602.

The previous prime is 115601. The next prime is 115613. The reversal of 115603 is 306511.

It is a weak prime.

It is an emirp because it is prime and its reverse (306511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115603 - 2¹ = 115601 is a prime.

Together with 115601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57801 + 57802.

It is an arithmetic number, because the mean of its divisors is an integer number (57802).

2¹¹⁵⁶⁰³ is an apocalyptic number.

115603 is a deficient number, since it is larger than the sum of its proper divisors (1).

115603 is an equidigital number, since it uses as much as digits as its factorization.

115603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 115603 is about 340.0044117361. The cubic root of 115603 is about 48.7142889904.

The spelling of 115603 in words is "one hundred fifteen thousand, six hundred three".