13212505 has 8 divisors (see below), whose sum is σ = 16689600. Its totient is φ = 10013616.

The previous prime is 13212491. The next prime is 13212523. The reversal of 13212505 is 50521231.

13212505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13212505 - 2⁷ = 13212377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69445 + ... + 69634.

It is an arithmetic number, because the mean of its divisors is an integer number (2086200).

Almost surely, 2^13212505 is an apocalyptic number.

It is an amenable number.

13212505 is a deficient number, since it is larger than the sum of its proper divisors (3477095).

13212505 is a wasteful number, since it uses less digits than its factorization.

13212505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139103.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 13212505 is about 3634.9009615119. The cubic root of 13212505 is about 236.4077564896.

Adding to 13212505 its reverse (50521231), we get a palindrome (63733736).

The spelling of 13212505 in words is "thirteen million, two hundred twelve thousand, five hundred five".