12947505 has 16 divisors (see below), whose sum is σ = 21617280. Its totient is φ = 6604928.

The previous prime is 12947497. The next prime is 12947507. The reversal of 12947505 is 50574921.

It is a cyclic number.

It is not a de Polignac number, because 12947505 - 2³ = 12947497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12947507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18420 + ... + 19109.

It is an arithmetic number, because the mean of its divisors is an integer number (1351080).

Almost surely, 2^12947505 is an apocalyptic number.

12947505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12947505 is a deficient number, since it is larger than the sum of its proper divisors (8669775).

12947505 is a wasteful number, since it uses less digits than its factorization.

12947505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37560.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 12947505 is about 3598.2641648439. The cubic root of 12947505 is about 234.8165461245.

The spelling of 12947505 in words is "twelve million, nine hundred forty-seven thousand, five hundred five".