12542117 has 4 divisors (see below), whose sum is σ = 14333856. Its totient is φ = 10750380.

The previous prime is 12542113. The next prime is 12542137. The reversal of 12542117 is 71124521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71124521 = 13 ⋅5471117.

It is a cyclic number.

It is not a de Polignac number, because 12542117 - 2² = 12542113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12542092 and 12542101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895859 + ... + 895872.

It is an arithmetic number, because the mean of its divisors is an integer number (3583464).

Almost surely, 2^12542117 is an apocalyptic number.

It is an amenable number.

12542117 is a deficient number, since it is larger than the sum of its proper divisors (1791739).

12542117 is an equidigital number, since it uses as much as digits as its factorization.

12542117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791738.

The product of its digits is 560, while the sum is 23.

The square root of 12542117 is about 3541.4851404460. The cubic root of 12542117 is about 232.3398025453.

Adding to 12542117 its reverse (71124521), we get a palindrome (83666638).

It can be divided in two parts, 125 and 42117, that multiplied together give a palindrome (5264625).

The spelling of 12542117 in words is "twelve million, five hundred forty-two thousand, one hundred seventeen".