12151717 has 2 divisors, whose sum is σ = 12151718. Its totient is φ = 12151716.

The previous prime is 12151687. The next prime is 12151739. The reversal of 12151717 is 71715121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 4137156 = 2831^2 + 2034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12151717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12151691 and 12151700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12151747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6075858 + 6075859.

It is an arithmetic number, because the mean of its divisors is an integer number (6075859).

Almost surely, 2^12151717 is an apocalyptic number.

It is an amenable number.

12151717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12151717 is an equidigital number, since it uses as much as digits as its factorization.

12151717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490, while the sum is 25.

The square root of 12151717 is about 3485.9312959380. The cubic root of 12151717 is about 229.9036584532.

Adding to 12151717 its reverse (71715121), we get a palindrome (83866838).

The spelling of 12151717 in words is "twelve million, one hundred fifty-one thousand, seven hundred seventeen".