12748449 has 32 divisors (see below), whose sum is σ = 20736000. Its totient is φ = 6804864.

The previous prime is 12748447. The next prime is 12748459. The reversal of 12748449 is 94484721.

It is not a de Polignac number, because 12748449 - 2¹ = 12748447 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12748447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35332 + ... + 35690.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^12748449 is an apocalyptic number.

12748449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12748449 is a deficient number, since it is larger than the sum of its proper divisors (7987551).

12748449 is a wasteful number, since it uses less digits than its factorization.

12748449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its digits is 64512, while the sum is 39.

The square root of 12748449 is about 3570.4970242251. The cubic root of 12748449 is about 233.6069631162.

The spelling of 12748449 in words is "twelve million, seven hundred forty-eight thousand, four hundred forty-nine".