134613221 has 4 divisors (see below), whose sum is σ = 134642592. Its totient is φ = 134583852.

The previous prime is 134613211. The next prime is 134613239. The reversal of 134613221 is 122316431.

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: 122316431 = 1051 ⋅116381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134613221 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 (134613211) 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, 6161 + ... + 17526.

It is an arithmetic number, because the mean of its divisors is an integer number (33660648).

Almost surely, 2^134613221 is an apocalyptic number.

It is an amenable number.

134613221 is a deficient number, since it is larger than the sum of its proper divisors (29371).

134613221 is an equidigital number, since it uses as much as digits as its factorization.

134613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29370.

The product of its digits is 864, while the sum is 23.

The square root of 134613221 is about 11602.2937818347. The cubic root of 134613221 is about 512.5024022096.

Adding to 134613221 its reverse (122316431), we get a palindrome (256929652).

The spelling of 134613221 in words is "one hundred thirty-four million, six hundred thirteen thousand, two hundred twenty-one".