135242563 has 2 divisors, whose sum is σ = 135242564. Its totient is φ = 135242562.

The previous prime is 135242561. The next prime is 135242579. The reversal of 135242563 is 365242531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135242563 - 2¹ = 135242561 is a prime.

Together with 135242561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135242561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67621281 + 67621282.

It is an arithmetic number, because the mean of its divisors is an integer number (67621282).

Almost surely, 2^135242563 is an apocalyptic number.

135242563 is a deficient number, since it is larger than the sum of its proper divisors (1).

135242563 is an equidigital number, since it uses as much as digits as its factorization.

135242563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

The square root of 135242563 is about 11629.3836036137. The cubic root of 135242563 is about 513.2998423176.

The spelling of 135242563 in words is "one hundred thirty-five million, two hundred forty-two thousand, five hundred sixty-three".