134242221 has 4 divisors (see below), whose sum is σ = 178989632. Its totient is φ = 89494812.

The previous prime is 134242219. The next prime is 134242243. The reversal of 134242221 is 122242431.

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 not a de Polignac number, because 134242221 - 2¹ = 134242219 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 (134242211) 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, 22373701 + ... + 22373706.

It is an arithmetic number, because the mean of its divisors is an integer number (44747408).

Almost surely, 2^134242221 is an apocalyptic number.

It is an amenable number.

134242221 is a deficient number, since it is larger than the sum of its proper divisors (44747411).

134242221 is an equidigital number, since it uses as much as digits as its factorization.

134242221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44747410.

The product of its digits is 768, while the sum is 21.

The square root of 134242221 is about 11586.2945327659. The cubic root of 134242221 is about 512.0311425657.

Adding to 134242221 its reverse (122242431), we get a palindrome (256484652).

The spelling of 134242221 in words is "one hundred thirty-four million, two hundred forty-two thousand, two hundred twenty-one".