13342821 has 4 divisors (see below), whose sum is σ = 17790432. Its totient is φ = 8895212.

The previous prime is 13342789. The next prime is 13342853. The reversal of 13342821 is 12824331.

13342821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (13342789) and next prime (13342853).

It is a cyclic number.

It is not a de Polignac number, because 13342821 - 2⁵ = 13342789 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13342791 and 13342800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13342891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223801 + ... + 2223806.

It is an arithmetic number, because the mean of its divisors is an integer number (4447608).

Almost surely, 2^13342821 is an apocalyptic number.

It is an amenable number.

13342821 is a deficient number, since it is larger than the sum of its proper divisors (4447611).

13342821 is an equidigital number, since it uses as much as digits as its factorization.

13342821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447610.

The product of its digits is 1152, while the sum is 24.

The square root of 13342821 is about 3652.7826379351. The cubic root of 13342821 is about 237.1824513273.

The spelling of 13342821 in words is "thirteen million, three hundred forty-two thousand, eight hundred twenty-one".