12736261 has 2 divisors, whose sum is σ = 12736262. Its totient is φ = 12736260.

The previous prime is 12736253. The next prime is 12736277. The reversal of 12736261 is 16263721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 799236 = 3455^2 + 894^2 .

It is an emirp because it is prime and its reverse (16263721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12736261 - 2³ = 12736253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12736561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6368130 + 6368131.

It is an arithmetic number, because the mean of its divisors is an integer number (6368131).

Almost surely, 2^12736261 is an apocalyptic number.

It is an amenable number.

12736261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12736261 is an equidigital number, since it uses as much as digits as its factorization.

12736261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 12736261 is about 3568.7898509159. The cubic root of 12736261 is about 233.5324936783.

Adding to 12736261 its reverse (16263721), we get a palindrome (28999982).

The spelling of 12736261 in words is "twelve million, seven hundred thirty-six thousand, two hundred sixty-one".