134444221 has 4 divisors (see below), whose sum is σ = 134509500. Its totient is φ = 134378944.

The previous prime is 134444213. The next prime is 134444237. The reversal of 134444221 is 122444431.

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 34164025 + 100280196 = 5845^2 + 10014^2 .

It is a cyclic number.

It is not a de Polignac number, because 134444221 - 2³ = 134444213 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 (134444291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29446 + ... + 33703.

It is an arithmetic number, because the mean of its divisors is an integer number (33627375).

Almost surely, 2^134444221 is an apocalyptic number.

It is an amenable number.

134444221 is a deficient number, since it is larger than the sum of its proper divisors (65279).

134444221 is an equidigital number, since it uses as much as digits as its factorization.

134444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65278.

The product of its digits is 3072, while the sum is 25.

The square root of 134444221 is about 11595.0084519159. The cubic root of 134444221 is about 512.2878388935.

Adding to 134444221 its reverse (122444431), we get a palindrome (256888652).

It can be divided in two parts, 1344442 and 21, that multiplied together give a palindrome (28233282).

The spelling of 134444221 in words is "one hundred thirty-four million, four hundred forty-four thousand, two hundred twenty-one".