13434221 has 4 divisors (see below), whose sum is σ = 13897500. Its totient is φ = 12970944.

The previous prime is 13434217. The next prime is 13434229. The reversal of 13434221 is 12243431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 9066121 = 2090^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 13434221 - 2² = 13434217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13434193 and 13434202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13434229) 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, 231596 + ... + 231653.

It is an arithmetic number, because the mean of its divisors is an integer number (3474375).

Almost surely, 2^13434221 is an apocalyptic number.

It is an amenable number.

13434221 is a deficient number, since it is larger than the sum of its proper divisors (463279).

13434221 is an equidigital number, since it uses as much as digits as its factorization.

13434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463278.

The product of its digits is 576, while the sum is 20.

The square root of 13434221 is about 3665.2722954782. The cubic root of 13434221 is about 237.7227959186.

Adding to 13434221 its reverse (12243431), we get a palindrome (25677652).

The spelling of 13434221 in words is "thirteen million, four hundred thirty-four thousand, two hundred twenty-one".