134220321 has 24 divisors (see below), whose sum is σ = 212887584. Its totient is φ = 84214080.

The previous prime is 134220293. The next prime is 134220337. The reversal of 134220321 is 123022431.

134220321 is a `hidden beast` number, since 1 + 342 + 2 + 0 + 321 = 666.

It is not a de Polignac number, because 134220321 - 2⁶ = 134220257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134220294 and 134220303.

It is not an unprimeable number, because it can be changed into a prime (134228321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12115 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (8870316).

Almost surely, 2^134220321 is an apocalyptic number.

It is an amenable number.

134220321 is a deficient number, since it is larger than the sum of its proper divisors (78667263).

134220321 is an equidigital number, since it uses as much as digits as its factorization.

134220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32523 (or 32511 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 134220321 is about 11585.3494120808. The cubic root of 134220321 is about 512.0032971488.

Adding to 134220321 its reverse (123022431), we get a palindrome (257242752).

The spelling of 134220321 in words is "one hundred thirty-four million, two hundred twenty thousand, three hundred twenty-one".