12989526 has 64 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 3659040.

The previous prime is 12989519. The next prime is 12989539. The reversal of 12989526 is 62598921.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65175 + ... + 65373.

It is an arithmetic number, because the mean of its divisors is an integer number (475200).

Almost surely, 2^12989526 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12989526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15206400).

12989526 is an abundant number, since it is smaller than the sum of its proper divisors (17423274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12989526 is a wasteful number, since it uses less digits than its factorization.

12989526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its digits is 77760, while the sum is 42.

The square root of 12989526 is about 3604.0985003188. The cubic root of 12989526 is about 235.0703033961.

It can be divided in two parts, 129895 and 26, that added together give a palindrome (129921).

The spelling of 12989526 in words is "twelve million, nine hundred eighty-nine thousand, five hundred twenty-six".