13214821 has 4 divisors (see below), whose sum is σ = 13338432. Its totient is φ = 13091212.

The previous prime is 13214819. The next prime is 13214827. The reversal of 13214821 is 12841231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13214821 - 2¹ = 13214819 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13214792 and 13214801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13214827) 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, 61645 + ... + 61858.

It is an arithmetic number, because the mean of its divisors is an integer number (3334608).

Almost surely, 2^13214821 is an apocalyptic number.

It is an amenable number.

13214821 is a deficient number, since it is larger than the sum of its proper divisors (123611).

13214821 is a wasteful number, since it uses less digits than its factorization.

13214821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123610.

The product of its digits is 384, while the sum is 22.

The square root of 13214821 is about 3635.2195256958. The cubic root of 13214821 is about 236.4215688685.

The spelling of 13214821 in words is "thirteen million, two hundred fourteen thousand, eight hundred twenty-one".