12947511 has 4 divisors (see below), whose sum is σ = 17263352. Its totient is φ = 8631672.

The previous prime is 12947507. The next prime is 12947527. The reversal of 12947511 is 11574921.

12947511 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11574921 = 3 ⋅3858307.

It is not a de Polignac number, because 12947511 - 2² = 12947507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12947411) 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 3 ways as a sum of consecutive naturals, for example, 2157916 + ... + 2157921.

It is an arithmetic number, because the mean of its divisors is an integer number (4315838).

Almost surely, 2^12947511 is an apocalyptic number.

12947511 is a deficient number, since it is larger than the sum of its proper divisors (4315841).

12947511 is an equidigital number, since it uses as much as digits as its factorization.

12947511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315840.

The product of its digits is 2520, while the sum is 30.

The square root of 12947511 is about 3598.2649985792. The cubic root of 12947511 is about 234.8165823965.

The spelling of 12947511 in words is "twelve million, nine hundred forty-seven thousand, five hundred eleven".