12526989 has 4 divisors (see below), whose sum is σ = 16702656. Its totient is φ = 8351324.

The previous prime is 12526981. The next prime is 12526993. The reversal of 12526989 is 98962521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12526989 - 2³ = 12526981 is a prime.

It is a super-2 number, since 2×12526989² = 313850906812242, which contains 22 as substring.

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 12526989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12526981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087829 + ... + 2087834.

It is an arithmetic number, because the mean of its divisors is an integer number (4175664).

Almost surely, 2^12526989 is an apocalyptic number.

It is an amenable number.

12526989 is a deficient number, since it is larger than the sum of its proper divisors (4175667).

12526989 is an equidigital number, since it uses as much as digits as its factorization.

12526989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175666.

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

The square root of 12526989 is about 3539.3486688938. The cubic root of 12526989 is about 232.2463507340.

The spelling of 12526989 in words is "twelve million, five hundred twenty-six thousand, nine hundred eighty-nine".