135286881 has 8 divisors (see below), whose sum is σ = 180838464. Its totient is φ = 89963280.

The previous prime is 135286861. The next prime is 135286913. The reversal of 135286881 is 188682531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135286881 - 2⁵ = 135286849 is a prime.

It is a super-2 number, since 2×135286881² = 36605080341416322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135286831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55605 + ... + 57986.

It is an arithmetic number, because the mean of its divisors is an integer number (22604808).

Almost surely, 2^135286881 is an apocalyptic number.

It is an amenable number.

135286881 is a deficient number, since it is larger than the sum of its proper divisors (45551583).

135286881 is a wasteful number, since it uses less digits than its factorization.

135286881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113991.

The product of its digits is 92160, while the sum is 42.

The square root of 135286881 is about 11631.2888795696. The cubic root of 135286881 is about 513.3559043972.

The spelling of 135286881 in words is "one hundred thirty-five million, two hundred eighty-six thousand, eight hundred eighty-one".