120320503 has 4 divisors (see below), whose sum is σ = 120388048. Its totient is φ = 120252960.

The previous prime is 120320443. The next prime is 120320513. The reversal of 120320503 is 305023021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305023021 = 199 ⋅1532779.

It is a cyclic number.

It is not a de Polignac number, because 120320503 - 2²¹ = 118223351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120320513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31026 + ... + 34687.

It is an arithmetic number, because the mean of its divisors is an integer number (30097012).

Almost surely, 2^120320503 is an apocalyptic number.

120320503 is a deficient number, since it is larger than the sum of its proper divisors (67545).

120320503 is an equidigital number, since it uses as much as digits as its factorization.

120320503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67544.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 120320503 is about 10969.0702887711. The cubic root of 120320503 is about 493.6811513680.

Adding to 120320503 its reverse (305023021), we get a palindrome (425343524).

The spelling of 120320503 in words is "one hundred twenty million, three hundred twenty thousand, five hundred three".