12542917 has 2 divisors, whose sum is σ = 12542918. Its totient is φ = 12542916.

The previous prime is 12542911. The next prime is 12542921. The reversal of 12542917 is 71924521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9740641 + 2802276 = 3121^2 + 1674^2 .

It is an emirp because it is prime and its reverse (71924521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12542917 - 2²³ = 4154309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12542911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271458 + 6271459.

It is an arithmetic number, because the mean of its divisors is an integer number (6271459).

Almost surely, 2^12542917 is an apocalyptic number.

It is an amenable number.

12542917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542917 is an equidigital number, since it uses as much as digits as its factorization.

12542917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 12542917 is about 3541.5980856105. The cubic root of 12542917 is about 232.3447423783.

The spelling of 12542917 in words is "twelve million, five hundred forty-two thousand, nine hundred seventeen".