13164821 has 2 divisors, whose sum is σ = 13164822. Its totient is φ = 13164820.

The previous prime is 13164803. The next prime is 13164881. The reversal of 13164821 is 12846131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12460900 + 703921 = 3530^2 + 839^2 .

It is an emirp because it is prime and its reverse (12846131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13164821 - 2⁶ = 13164757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13164881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6582410 + 6582411.

It is an arithmetic number, because the mean of its divisors is an integer number (6582411).

Almost surely, 2^13164821 is an apocalyptic number.

It is an amenable number.

13164821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13164821 is an equidigital number, since it uses as much as digits as its factorization.

13164821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 13164821 is about 3628.3358444334. The cubic root of 13164821 is about 236.1230147242.

It can be divided in two parts, 1316 and 4821, that multiplied together give a palindrome (6344436).

The spelling of 13164821 in words is "thirteen million, one hundred sixty-four thousand, eight hundred twenty-one".