133142081 has 2 divisors, whose sum is σ = 133142082. Its totient is φ = 133142080.

The previous prime is 133142059. The next prime is 133142143. The reversal of 133142081 is 180241331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 2611456 = 11425^2 + 1616^2 .

It is an emirp because it is prime and its reverse (180241331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133142081 - 2¹⁴ = 133125697 is a prime.

It is a super-2 number, since 2×133142081² = 35453627466021122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133142041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66571040 + 66571041.

It is an arithmetic number, because the mean of its divisors is an integer number (66571041).

Almost surely, 2^133142081 is an apocalyptic number.

It is an amenable number.

133142081 is a deficient number, since it is larger than the sum of its proper divisors (1).

133142081 is an equidigital number, since it uses as much as digits as its factorization.

133142081 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 23.

The square root of 133142081 is about 11538.7209429815. The cubic root of 133142081 is about 510.6285739340.

The spelling of 133142081 in words is "one hundred thirty-three million, one hundred forty-two thousand, eighty-one".