134405221 has 4 divisors (see below), whose sum is σ = 141479200. Its totient is φ = 127331244.

The previous prime is 134405203. The next prime is 134405231. The reversal of 134405221 is 122504431.

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 a cyclic number.

It is not a de Polignac number, because 134405221 - 2²¹ = 132308069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134405192 and 134405201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134405231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3536961 + ... + 3536998.

It is an arithmetic number, because the mean of its divisors is an integer number (35369800).

Almost surely, 2^134405221 is an apocalyptic number.

It is an amenable number.

134405221 is a deficient number, since it is larger than the sum of its proper divisors (7073979).

134405221 is an equidigital number, since it uses as much as digits as its factorization.

134405221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073978.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 134405221 is about 11593.3265717826. The cubic root of 134405221 is about 512.2382987502.

Adding to 134405221 its reverse (122504431), we get a palindrome (256909652).

The spelling of 134405221 in words is "one hundred thirty-four million, four hundred five thousand, two hundred twenty-one".