134220257 has 2 divisors, whose sum is σ = 134220258. Its totient is φ = 134220256.

The previous prime is 134220239. The next prime is 134220259. The reversal of 134220257 is 752022431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 15649936 = 10889^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 134220257 - 2⁶ = 134220193 is a prime.

Together with 134220259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134220259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67110128 + 67110129.

It is an arithmetic number, because the mean of its divisors is an integer number (67110129).

Almost surely, 2^134220257 is an apocalyptic number.

It is an amenable number.

134220257 is a deficient number, since it is larger than the sum of its proper divisors (1).

134220257 is an equidigital number, since it uses as much as digits as its factorization.

134220257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 134220257 is about 11585.3466499712. The cubic root of 134220257 is about 512.0032157696.

Adding to 134220257 its reverse (752022431), we get a palindrome (886242688).

The spelling of 134220257 in words is "one hundred thirty-four million, two hundred twenty thousand, two hundred fifty-seven".