12748661 has 8 divisors (see below), whose sum is σ = 13413600. Its totient is φ = 12098800.

The previous prime is 12748651. The next prime is 12748669. The reversal of 12748661 is 16684721.

12748661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12748661 - 2¹⁴ = 12732277 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 (12748669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (1676700).

Almost surely, 2^12748661 is an apocalyptic number.

It is an amenable number.

12748661 is a deficient number, since it is larger than the sum of its proper divisors (664939).

12748661 is an equidigital number, since it uses as much as digits as its factorization.

12748661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its digits is 16128, while the sum is 35.

The square root of 12748661 is about 3570.5267118452. The cubic root of 12748661 is about 233.6082580293.

The spelling of 12748661 in words is "twelve million, seven hundred forty-eight thousand, six hundred sixty-one".