12747905 has 8 divisors (see below), whose sum is σ = 15330600. Its totient is φ = 10176256.

The previous prime is 12747901. The next prime is 12747937. The reversal of 12747905 is 50974721.

It can be written as a sum of positive squares in 4 ways, for example, as 2686321 + 10061584 = 1639^2 + 3172^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12747905 - 2² = 12747901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12747901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (1916325).

Almost surely, 2^12747905 is an apocalyptic number.

It is an amenable number.

12747905 is a deficient number, since it is larger than the sum of its proper divisors (2582695).

12747905 is an equidigital number, since it uses as much as digits as its factorization.

12747905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12747905 is about 3570.4208435421. The cubic root of 12747905 is about 233.6036402545.

The spelling of 12747905 in words is "twelve million, seven hundred forty-seven thousand, nine hundred five".