12517245 has 24 divisors (see below), whose sum is σ = 23366616. Its totient is φ = 6162048.

The previous prime is 12517243. The next prime is 12517249. The reversal of 12517245 is 54271521.

12517245 is nontrivially palindromic in base 2 and base 8.

It can be written as a sum of positive squares in 4 ways, for example, as 2442969 + 10074276 = 1563^2 + 3174^2 .

It is not a de Polignac number, because 12517245 - 2¹ = 12517243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12517243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10114 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (973609).

Almost surely, 2^12517245 is an apocalyptic number.

12517245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12517245 is a deficient number, since it is larger than the sum of its proper divisors (10849371).

12517245 is a wasteful number, since it uses less digits than its factorization.

12517245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421 (or 21418 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 12517245 is about 3537.9718766548. The cubic root of 12517245 is about 232.1861182379.

Adding to 12517245 its reverse (54271521), we get a palindrome (66788766).

The spelling of 12517245 in words is "twelve million, five hundred seventeen thousand, two hundred forty-five".