120403243 has 4 divisors (see below), whose sum is σ = 121027288. Its totient is φ = 119779200.

The previous prime is 120403223. The next prime is 120403249. The reversal of 120403243 is 342304021.

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 120403243 - 2¹⁷ = 120272171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120403243.

It is not an unprimeable number, because it can be changed into a prime (120403249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311733 + ... + 312118.

It is an arithmetic number, because the mean of its divisors is an integer number (30256822).

Almost surely, 2^120403243 is an apocalyptic number.

120403243 is a deficient number, since it is larger than the sum of its proper divisors (624045).

120403243 is an equidigital number, since it uses as much as digits as its factorization.

120403243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624044.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 120403243 is about 10972.8411544139. The cubic root of 120403243 is about 493.7942875833.

Adding to 120403243 its reverse (342304021), we get a palindrome (462707264).

The spelling of 120403243 in words is "one hundred twenty million, four hundred three thousand, two hundred forty-three".