134143421 has 2 divisors, whose sum is σ = 134143422. Its totient is φ = 134143420.

The previous prime is 134143393. The next prime is 134143441. The reversal of 134143421 is 124341431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 2788900 = 11461^2 + 1670^2 .

It is an emirp because it is prime and its reverse (124341431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134143421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134143441) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67071710 + 67071711.

It is an arithmetic number, because the mean of its divisors is an integer number (67071711).

Almost surely, 2^134143421 is an apocalyptic number.

It is an amenable number.

134143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

134143421 is an equidigital number, since it uses as much as digits as its factorization.

134143421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 134143421 is about 11582.0300897554. The cubic root of 134143421 is about 511.9054963212.

Adding to 134143421 its reverse (124341431), we get a palindrome (258484852).

The spelling of 134143421 in words is "one hundred thirty-four million, one hundred forty-three thousand, four hundred twenty-one".