135256187 has 4 divisors (see below), whose sum is σ = 147552216. Its totient is φ = 122960160.

The previous prime is 135256157. The next prime is 135256211. The reversal of 135256187 is 781652531.

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 135256187 - 2¹⁰ = 135255163 is a prime.

It is a super-2 number, since 2×135256187² = 36588472243557938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135256187.

It is not an unprimeable number, because it can be changed into a prime (135256157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6147998 + ... + 6148019.

It is an arithmetic number, because the mean of its divisors is an integer number (36888054).

Almost surely, 2^135256187 is an apocalyptic number.

135256187 is a deficient number, since it is larger than the sum of its proper divisors (12296029).

135256187 is a wasteful number, since it uses less digits than its factorization.

135256187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12296028.

The product of its digits is 50400, while the sum is 38.

The square root of 135256187 is about 11629.9693464772. The cubic root of 135256187 is about 513.3170779227.

The spelling of 135256187 in words is "one hundred thirty-five million, two hundred fifty-six thousand, one hundred eighty-seven".