12781453 has 2 divisors, whose sum is σ = 12781454. Its totient is φ = 12781452.

The previous prime is 12781451. The next prime is 12781459. The reversal of 12781453 is 35418721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 412164 = 3517^2 + 642^2 .

It is a cyclic number.

It is not a de Polignac number, because 12781453 - 2¹ = 12781451 is a prime.

Together with 12781451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12781451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390726 + 6390727.

It is an arithmetic number, because the mean of its divisors is an integer number (6390727).

Almost surely, 2^12781453 is an apocalyptic number.

It is an amenable number.

12781453 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781453 is an equidigital number, since it uses as much as digits as its factorization.

12781453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 12781453 is about 3575.1158023203. The cubic root of 12781453 is about 233.8083816159.

The spelling of 12781453 in words is "twelve million, seven hundred eighty-one thousand, four hundred fifty-three".