134731321 has 2 divisors, whose sum is σ = 134731322. Its totient is φ = 134731320.

The previous prime is 134731283. The next prime is 134731343. The reversal of 134731321 is 123137431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 287296 = 11595^2 + 536^2 .

It is an emirp because it is prime and its reverse (123137431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134731321 - 2¹⁹ = 134207033 is a prime.

It is not a weakly prime, because it can be changed into another prime (134731391) 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 as a sum of consecutive naturals, namely, 67365660 + 67365661.

It is an arithmetic number, because the mean of its divisors is an integer number (67365661).

Almost surely, 2^134731321 is an apocalyptic number.

It is an amenable number.

134731321 is a deficient number, since it is larger than the sum of its proper divisors (1).

134731321 is an equidigital number, since it uses as much as digits as its factorization.

134731321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 134731321 is about 11607.3821768735. The cubic root of 134731321 is about 512.6522360356.

Adding to 134731321 its reverse (123137431), we get a palindrome (257868752).

The spelling of 134731321 in words is "one hundred thirty-four million, seven hundred thirty-one thousand, three hundred twenty-one".