135258817 has 4 divisors (see below), whose sum is σ = 143215236. Its totient is φ = 127302400.

The previous prime is 135258803. The next prime is 135258841. The reversal of 135258817 is 718852531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 83978896 = 7161^2 + 9164^2 .

It is a cyclic number.

It is not a de Polignac number, because 135258817 - 2⁷ = 135258689 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 135258817.

It is not an unprimeable number, because it can be changed into a prime (135258887) 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, 3978184 + ... + 3978217.

It is an arithmetic number, because the mean of its divisors is an integer number (35803809).

Almost surely, 2^135258817 is an apocalyptic number.

135258817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135258817 is a deficient number, since it is larger than the sum of its proper divisors (7956419).

135258817 is an equidigital number, since it uses as much as digits as its factorization.

135258817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956418.

The product of its digits is 67200, while the sum is 40.

The square root of 135258817 is about 11630.0824158731. The cubic root of 135258817 is about 513.3204049798.

The spelling of 135258817 in words is "one hundred thirty-five million, two hundred fifty-eight thousand, eight hundred seventeen".