12748745 has 8 divisors (see below), whose sum is σ = 15671880. Its totient is φ = 9950080.

The previous prime is 12748741. The next prime is 12748751. The reversal of 12748745 is 54784721.

It can be written as a sum of positive squares in 4 ways, for example, as 379456 + 12369289 = 616^2 + 3517^2 .

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

It is not a de Polignac number, because 12748745 - 2² = 12748741 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12748699 and 12748708.

It is not an unprimeable number, because it can be changed into a prime (12748741) 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 7 ways as a sum of consecutive naturals, for example, 30890 + ... + 31299.

It is an arithmetic number, because the mean of its divisors is an integer number (1958985).

Almost surely, 2^12748745 is an apocalyptic number.

It is an amenable number.

12748745 is a deficient number, since it is larger than the sum of its proper divisors (2923135).

12748745 is an equidigital number, since it uses as much as digits as its factorization.

12748745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62235.

The product of its digits is 62720, while the sum is 38.

The square root of 12748745 is about 3570.5384747962. The cubic root of 12748745 is about 233.6087711041.

The spelling of 12748745 in words is "twelve million, seven hundred forty-eight thousand, seven hundred forty-five".