12731103 has 24 divisors (see below), whose sum is σ = 22928256. Its totient is φ = 6613200.

The previous prime is 12731099. The next prime is 12731129. The reversal of 12731103 is 30113721.

12731103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12731103 - 2² = 12731099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8493 + ... + 9878.

It is an arithmetic number, because the mean of its divisors is an integer number (955344).

Almost surely, 2^12731103 is an apocalyptic number.

12731103 is a deficient number, since it is larger than the sum of its proper divisors (10197153).

12731103 is a wasteful number, since it uses less digits than its factorization.

12731103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18395 (or 18392 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 12731103 is about 3568.0671238081. The cubic root of 12731103 is about 233.5009636699.

Adding to 12731103 its reverse (30113721), we get a palindrome (42844824).

The spelling of 12731103 in words is "twelve million, seven hundred thirty-one thousand, one hundred three".