12551689 has 2 divisors, whose sum is σ = 12551690. Its totient is φ = 12551688.

The previous prime is 12551687. The next prime is 12551711. The reversal of 12551689 is 98615521.

12551689 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10017225 + 2534464 = 3165^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551689 - 2¹ = 12551687 is a prime.

Together with 12551687, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12551681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275844 + 6275845.

It is an arithmetic number, because the mean of its divisors is an integer number (6275845).

Almost surely, 2^12551689 is an apocalyptic number.

It is an amenable number.

12551689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551689 is an equidigital number, since it uses as much as digits as its factorization.

12551689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 37.

The square root of 12551689 is about 3542.8362931414. The cubic root of 12551689 is about 232.3988938737.

The spelling of 12551689 in words is "twelve million, five hundred fifty-one thousand, six hundred eighty-nine".