134967221 has 4 divisors (see below), whose sum is σ = 137838912. Its totient is φ = 132095532.

The previous prime is 134967191. The next prime is 134967223. The reversal of 134967221 is 122769431.

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: 122769431 = 19 ⋅6461549.

It is a cyclic number.

It is not a de Polignac number, because 134967221 - 2¹⁰ = 134966197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134967223) 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, 1435775 + ... + 1435868.

It is an arithmetic number, because the mean of its divisors is an integer number (34459728).

Almost surely, 2^134967221 is an apocalyptic number.

It is an amenable number.

134967221 is a deficient number, since it is larger than the sum of its proper divisors (2871691).

134967221 is an equidigital number, since it uses as much as digits as its factorization.

134967221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871690.

The product of its digits is 18144, while the sum is 35.

The square root of 134967221 is about 11617.5393694190. The cubic root of 134967221 is about 512.9512611595.

The spelling of 134967221 in words is "one hundred thirty-four million, nine hundred sixty-seven thousand, two hundred twenty-one".