12531245 has 8 divisors (see below), whose sum is σ = 15057816. Its totient is φ = 10011456.

The previous prime is 12531221. The next prime is 12531247. The reversal of 12531245 is 54213521.

It can be written as a sum of positive squares in 4 ways, for example, as 3374569 + 9156676 = 1837^2 + 3026^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12531245 - 2²² = 8336941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12531245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4319 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (1882227).

Almost surely, 2^12531245 is an apocalyptic number.

It is an amenable number.

12531245 is a deficient number, since it is larger than the sum of its proper divisors (2526571).

12531245 is a wasteful number, since it uses less digits than its factorization.

12531245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391.

The product of its digits is 1200, while the sum is 23.

The square root of 12531245 is about 3539.9498584020. The cubic root of 12531245 is about 232.2726493801.

Adding to 12531245 its reverse (54213521), we get a palindrome (66744766).

The spelling of 12531245 in words is "twelve million, five hundred thirty-one thousand, two hundred forty-five".