120531603 has 4 divisors (see below), whose sum is σ = 160708808. Its totient is φ = 80354400.

The previous prime is 120531589. The next prime is 120531617. The reversal of 120531603 is 306135021.

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

It is an interprime number because it is at equal distance from previous prime (120531589) and next prime (120531617).

It is not a de Polignac number, because 120531603 - 2⁸ = 120531347 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 120531603.

It is not an unprimeable number, because it can be changed into a prime (120531403) 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, 20088598 + ... + 20088603.

It is an arithmetic number, because the mean of its divisors is an integer number (40177202).

Almost surely, 2^120531603 is an apocalyptic number.

120531603 is a deficient number, since it is larger than the sum of its proper divisors (40177205).

120531603 is an equidigital number, since it uses as much as digits as its factorization.

120531603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40177204.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 120531603 is about 10978.6885828864. The cubic root of 120531603 is about 493.9697006992.

Adding to 120531603 its reverse (306135021), we get a palindrome (426666624).

The spelling of 120531603 in words is "one hundred twenty million, five hundred thirty-one thousand, six hundred three".