12788261 has 2 divisors, whose sum is σ = 12788262. Its totient is φ = 12788260.

The previous prime is 12788257. The next prime is 12788263. The reversal of 12788261 is 16288721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 185761 = 3550^2 + 431^2 .

It is an emirp because it is prime and its reverse (16288721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12788261 - 2² = 12788257 is a prime.

Together with 12788263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12788263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394130 + 6394131.

It is an arithmetic number, because the mean of its divisors is an integer number (6394131).

Almost surely, 2^12788261 is an apocalyptic number.

It is an amenable number.

12788261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12788261 is an equidigital number, since it uses as much as digits as its factorization.

12788261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 12788261 is about 3576.0678125561. The cubic root of 12788261 is about 233.8498866761.

It can be divided in two parts, 127 and 88261, that added together give a palindrome (88388).

The spelling of 12788261 in words is "twelve million, seven hundred eighty-eight thousand, two hundred sixty-one".