12540103 has 4 divisors (see below), whose sum is σ = 12588048. Its totient is φ = 12492160.

The previous prime is 12540049. The next prime is 12540109. The reversal of 12540103 is 30104521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30104521 = 199 ⋅151279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12540103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540109) 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, 23578 + ... + 24103.

It is an arithmetic number, because the mean of its divisors is an integer number (3147012).

Almost surely, 2^12540103 is an apocalyptic number.

12540103 is a deficient number, since it is larger than the sum of its proper divisors (47945).

12540103 is an equidigital number, since it uses as much as digits as its factorization.

12540103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47944.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12540103 is about 3541.2007850445. The cubic root of 12540103 is about 232.3273655856.

Adding to 12540103 its reverse (30104521), we get a palindrome (42644624).

The spelling of 12540103 in words is "twelve million, five hundred forty thousand, one hundred three".