135442291 has 2 divisors, whose sum is σ = 135442292. Its totient is φ = 135442290.

The previous prime is 135442289. The next prime is 135442327. The reversal of 135442291 is 192244531.

135442291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135442291 - 2¹ = 135442289 is a prime.

It is a super-2 number, since 2×135442291² = 36689228382657362, which contains 22 as substring.

Together with 135442289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135442211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67721145 + 67721146.

It is an arithmetic number, because the mean of its divisors is an integer number (67721146).

Almost surely, 2^135442291 is an apocalyptic number.

135442291 is a deficient number, since it is larger than the sum of its proper divisors (1).

135442291 is an equidigital number, since it uses as much as digits as its factorization.

135442291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 135442291 is about 11637.9676490356. The cubic root of 135442291 is about 513.5524006892.

The spelling of 135442291 in words is "one hundred thirty-five million, four hundred forty-two thousand, two hundred ninety-one".