134221 has 4 divisors (see below), whose sum is σ = 136000. Its totient is φ = 132444.

The previous prime is 134219. The next prime is 134227. The reversal of 134221 is 122431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122431 = 191 ⋅641.

It is a cyclic number.

It is not a de Polignac number, because 134221 - 2¹ = 134219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (34000).

2¹³⁴²²¹ is an apocalyptic number.

It is an amenable number.

134221 is a deficient number, since it is larger than the sum of its proper divisors (1779).

134221 is an equidigital number, since it uses as much as digits as its factorization.

134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778.

The product of its digits is 48, while the sum is 13.

The square root of 134221 is about 366.3618429913. The cubic root of 134221 is about 51.2004160529.

Adding to 134221 its reverse (122431), we get a palindrome (256652).

It can be divided in two parts, 1342 and 21, that multiplied together give a palindrome (28182).

The spelling of 134221 in words is "one hundred thirty-four thousand, two hundred twenty-one".