120115603 has 4 divisors (see below), whose sum is σ = 121032648. Its totient is φ = 119198560.

The previous prime is 120115577. The next prime is 120115621. The reversal of 120115603 is 306511021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120115603 - 2¹⁷ = 119984531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120115103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458326 + ... + 458587.

It is an arithmetic number, because the mean of its divisors is an integer number (30258162).

Almost surely, 2^120115603 is an apocalyptic number.

120115603 is a deficient number, since it is larger than the sum of its proper divisors (917045).

120115603 is an equidigital number, since it uses as much as digits as its factorization.

120115603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917044.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 120115603 is about 10959.7264108188. The cubic root of 120115603 is about 493.4007537615.

Adding to 120115603 its reverse (306511021), we get a palindrome (426626624).

The spelling of 120115603 in words is "one hundred twenty million, one hundred fifteen thousand, six hundred three".