13164421 has 4 divisors (see below), whose sum is σ = 13171852. Its totient is φ = 13156992.

The previous prime is 13164419. The next prime is 13164451. The reversal of 13164421 is 12446131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12446131 = 1471 ⋅8461.

It can be written as a sum of positive squares in 2 ways, for example, as 6477025 + 6687396 = 2545^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 13164421 - 2¹ = 13164419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13164392 and 13164401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13164401) 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 3 ways as a sum of consecutive naturals, for example, 661 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (3292963).

Almost surely, 2^13164421 is an apocalyptic number.

It is an amenable number.

13164421 is a deficient number, since it is larger than the sum of its proper divisors (7431).

13164421 is an equidigital number, since it uses as much as digits as its factorization.

13164421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430.

The product of its digits is 576, while the sum is 22.

The square root of 13164421 is about 3628.2807223257. The cubic root of 13164421 is about 236.1206232456.

The spelling of 13164421 in words is "thirteen million, one hundred sixty-four thousand, four hundred twenty-one".