12748261 has 4 divisors (see below), whose sum is σ = 12841452. Its totient is φ = 12655072.

The previous prime is 12748247. The next prime is 12748277. The reversal of 12748261 is 16284721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16284721 = 2129 ⋅7649.

It can be written as a sum of positive squares in 2 ways, for example, as 9922500 + 2825761 = 3150^2 + 1681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12748261 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12748231) 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 in 3 ways as a sum of consecutive naturals, for example, 46390 + ... + 46663.

It is an arithmetic number, because the mean of its divisors is an integer number (3210363).

Almost surely, 2^12748261 is an apocalyptic number.

It is an amenable number.

12748261 is a deficient number, since it is larger than the sum of its proper divisors (93191).

12748261 is an equidigital number, since it uses as much as digits as its factorization.

12748261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93190.

The product of its digits is 5376, while the sum is 31.

The square root of 12748261 is about 3570.4706972611. The cubic root of 12748261 is about 233.6058147850.

The spelling of 12748261 in words is "twelve million, seven hundred forty-eight thousand, two hundred sixty-one".