134830021 has 2 divisors, whose sum is σ = 134830022. Its totient is φ = 134830020.

The previous prime is 134830001. The next prime is 134830093. The reversal of 134830021 is 120038431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134212225 + 617796 = 11585^2 + 786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134830021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134829974 and 134830001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134830001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67415010 + 67415011.

It is an arithmetic number, because the mean of its divisors is an integer number (67415011).

Almost surely, 2^134830021 is an apocalyptic number.

It is an amenable number.

134830021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134830021 is an equidigital number, since it uses as much as digits as its factorization.

134830021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 134830021 is about 11611.6330031568. The cubic root of 134830021 is about 512.7773898717. Note that the first 3 decimals are identical.

Adding to 134830021 its reverse (120038431), we get a palindrome (254868452).

The spelling of 134830021 in words is "one hundred thirty-four million, eight hundred thirty thousand, twenty-one".