1201532603 has 4 divisors (see below), whose sum is σ = 1201620888. Its totient is φ = 1201444320.

The previous prime is 1201532599. The next prime is 1201532687. The reversal of 1201532603 is 3062351021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3062351021 = 107 ⋅28620103.

It is a cyclic number.

It is not a de Polignac number, because 1201532603 - 2² = 1201532599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201532693) 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, 18926 + ... + 52547.

It is an arithmetic number, because the mean of its divisors is an integer number (300405222).

Almost surely, 2^1201532603 is an apocalyptic number.

1201532603 is a deficient number, since it is larger than the sum of its proper divisors (88285).

1201532603 is an equidigital number, since it uses as much as digits as its factorization.

1201532603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88284.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1201532603 is about 34663.1303116150. The cubic root of 1201532603 is about 1063.1107749759.

Adding to 1201532603 its reverse (3062351021), we get a palindrome (4263883624).

The spelling of 1201532603 in words is "one billion, two hundred one million, five hundred thirty-two thousand, six hundred three".