12731603 has 4 divisors (see below), whose sum is σ = 12817200. Its totient is φ = 12646008.

The previous prime is 12731599. The next prime is 12731611. The reversal of 12731603 is 30613721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30613721 = 43 ⋅711947.

It is a cyclic number.

It is not a de Polignac number, because 12731603 - 2² = 12731599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12731633) 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, 42575 + ... + 42872.

It is an arithmetic number, because the mean of its divisors is an integer number (3204300).

Almost surely, 2^12731603 is an apocalyptic number.

12731603 is a deficient number, since it is larger than the sum of its proper divisors (85597).

12731603 is an equidigital number, since it uses as much as digits as its factorization.

12731603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85596.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 12731603 is about 3568.1371890666. The cubic root of 12731603 is about 233.5040204606.

The spelling of 12731603 in words is "twelve million, seven hundred thirty-one thousand, six hundred three".