12526289 has 16 divisors (see below), whose sum is σ = 13488720. Its totient is φ = 11612160.

The previous prime is 12526259. The next prime is 12526291. The reversal of 12526289 is 98262521.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 966289 + 11560000 = 983^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12526289 - 2¹² = 12522193 is a prime.

It is a super-2 number, since 2×12526289² = 313815832223042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12526219) 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 15 ways as a sum of consecutive naturals, for example, 129089 + ... + 129185.

It is an arithmetic number, because the mean of its divisors is an integer number (843045).

Almost surely, 2^12526289 is an apocalyptic number.

It is an amenable number.

12526289 is a deficient number, since it is larger than the sum of its proper divisors (962431).

12526289 is an equidigital number, since it uses as much as digits as its factorization.

12526289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

The product of its digits is 17280, while the sum is 35.

The square root of 12526289 is about 3539.2497792611. The cubic root of 12526289 is about 232.2420247284.

The spelling of 12526289 in words is "twelve million, five hundred twenty-six thousand, two hundred eighty-nine".