12117503 has 2 divisors, whose sum is σ = 12117504. Its totient is φ = 12117502.

The previous prime is 12117491. The next prime is 12117517. The reversal of 12117503 is 30571121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12117503 - 2⁸ = 12117247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12167503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058751 + 6058752.

It is an arithmetic number, because the mean of its divisors is an integer number (6058752).

Almost surely, 2^12117503 is an apocalyptic number.

12117503 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117503 is an equidigital number, since it uses as much as digits as its factorization.

12117503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 12117503 is about 3481.0203963781. The cubic root of 12117503 is about 229.6876857450.

Adding to 12117503 its reverse (30571121), we get a palindrome (42688624).

The spelling of 12117503 in words is "twelve million, one hundred seventeen thousand, five hundred three".