12747920 has 20 divisors (see below), whose sum is σ = 29639100. Its totient is φ = 5099136.

The previous prime is 12747901. The next prime is 12747937. The reversal of 12747920 is 2974721.

It can be written as a sum of positive squares in 2 ways, for example, as 8202496 + 4545424 = 2864^2 + 2132^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79595 + ... + 79754.

It is an arithmetic number, because the mean of its divisors is an integer number (1481955).

Almost surely, 2^12747920 is an apocalyptic number.

12747920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12747920 is an abundant number, since it is smaller than the sum of its proper divisors (16891180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12747920 is a wasteful number, since it uses less digits than its factorization.

12747920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159362 (or 159356 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 12747920 is about 3570.4229441342. The cubic root of 12747920 is about 233.6037318788.

The spelling of 12747920 in words is "twelve million, seven hundred forty-seven thousand, nine hundred twenty".