12681251 has 4 divisors (see below), whose sum is σ = 13834104. Its totient is φ = 11528400.

The previous prime is 12681247. The next prime is 12681289. The reversal of 12681251 is 15218621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12681251 - 2² = 12681247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12681251.

It is not an unprimeable number, because it can be changed into a prime (12680251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576410 + ... + 576431.

It is an arithmetic number, because the mean of its divisors is an integer number (3458526).

Almost surely, 2^12681251 is an apocalyptic number.

12681251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12681251 is a deficient number, since it is larger than the sum of its proper divisors (1152853).

12681251 is a wasteful number, since it uses less digits than its factorization.

12681251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152852.

The product of its digits is 960, while the sum is 26.

The square root of 12681251 is about 3561.0744165209. The cubic root of 12681251 is about 233.1957867347.

Adding to 12681251 its reverse (15218621), we get a palindrome (27899872).

The spelling of 12681251 in words is "twelve million, six hundred eighty-one thousand, two hundred fifty-one".