12522247 has 4 divisors (see below), whose sum is σ = 12637240. Its totient is φ = 12407256.

The previous prime is 12522241. The next prime is 12522253. The reversal of 12522247 is 74222521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74222521 = 103 ⋅720607.

It is an interprime number because it is at equal distance from previous prime (12522241) and next prime (12522253).

It is a cyclic number.

It is not a de Polignac number, because 12522247 - 2³ = 12522239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522241) 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, 57333 + ... + 57550.

It is an arithmetic number, because the mean of its divisors is an integer number (3159310).

Almost surely, 2^12522247 is an apocalyptic number.

12522247 is a deficient number, since it is larger than the sum of its proper divisors (114993).

12522247 is a wasteful number, since it uses less digits than its factorization.

12522247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114992.

The product of its digits is 2240, while the sum is 25.

The square root of 12522247 is about 3538.6787082186. The cubic root of 12522247 is about 232.2170419834.

Adding to 12522247 its reverse (74222521), we get a palindrome (86744768).

It can be divided in two parts, 12522 and 247, that added together give a square (12769 = 113²).

The spelling of 12522247 in words is "twelve million, five hundred twenty-two thousand, two hundred forty-seven".