12738261 has 4 divisors (see below), whose sum is σ = 16984352. Its totient is φ = 8492172.

The previous prime is 12738247. The next prime is 12738283. The reversal of 12738261 is 16283721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16283721 = 3 ⋅5427907.

It is not a de Polignac number, because 12738261 - 2⁷ = 12738133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12738211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123041 + ... + 2123046.

It is an arithmetic number, because the mean of its divisors is an integer number (4246088).

Almost surely, 2^12738261 is an apocalyptic number.

It is an amenable number.

12738261 is a deficient number, since it is larger than the sum of its proper divisors (4246091).

12738261 is an equidigital number, since it uses as much as digits as its factorization.

12738261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246090.

The product of its digits is 4032, while the sum is 30.

The square root of 12738261 is about 3569.0700469450. The cubic root of 12738261 is about 233.5447170600.

The spelling of 12738261 in words is "twelve million, seven hundred thirty-eight thousand, two hundred sixty-one".