135142643 has 4 divisors (see below), whose sum is σ = 135199680. Its totient is φ = 135085608.

The previous prime is 135142619. The next prime is 135142661. The reversal of 135142643 is 346241531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135142643 - 2⁸ = 135142387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135142603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24803 + ... + 29756.

It is an arithmetic number, because the mean of its divisors is an integer number (33799920).

Almost surely, 2^135142643 is an apocalyptic number.

135142643 is a deficient number, since it is larger than the sum of its proper divisors (57037).

135142643 is an equidigital number, since it uses as much as digits as its factorization.

135142643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57036.

The product of its digits is 8640, while the sum is 29.

The square root of 135142643 is about 11625.0867953749. The cubic root of 135142643 is about 513.1733989963.

The spelling of 135142643 in words is "one hundred thirty-five million, one hundred forty-two thousand, six hundred forty-three".