13212387 has 12 divisors (see below), whose sum is σ = 19122480. Its totient is φ = 8790768.

The previous prime is 13212377. The next prime is 13212403. The reversal of 13212387 is 78321231.

It is not a de Polignac number, because 13212387 - 2⁷ = 13212259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13212387.

It is not an unprimeable number, because it can be changed into a prime (13212307) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4689 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (1593540).

Almost surely, 2^13212387 is an apocalyptic number.

13212387 is a deficient number, since it is larger than the sum of its proper divisors (5910093).

13212387 is a wasteful number, since it uses less digits than its factorization.

13212387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922 (or 2919 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 13212387 is about 3634.8847299467. The cubic root of 13212387 is about 236.4070527069.

The spelling of 13212387 in words is "thirteen million, two hundred twelve thousand, three hundred eighty-seven".