13005047 has 4 divisors (see below), whose sum is σ = 14187336. Its totient is φ = 11822760.

The previous prime is 13005037. The next prime is 13005053. The reversal of 13005047 is 74050031.

It is a happy number.

13005047 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: 74050031 = 11 ⋅6731821.

It is a cyclic number.

It is not a de Polignac number, because 13005047 - 2¹⁸ = 12742903 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 (13005007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591128 + ... + 591149.

It is an arithmetic number, because the mean of its divisors is an integer number (3546834).

Almost surely, 2^13005047 is an apocalyptic number.

13005047 is a deficient number, since it is larger than the sum of its proper divisors (1182289).

13005047 is a wasteful number, since it uses less digits than its factorization.

13005047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182288.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 13005047 is about 3606.2511005198. The cubic root of 13005047 is about 235.1638935176.

Adding to 13005047 its reverse (74050031), we get a palindrome (87055078).

The spelling of 13005047 in words is "thirteen million, five thousand, forty-seven".