135285081 has 4 divisors (see below), whose sum is σ = 180380112. Its totient is φ = 90190052.

The previous prime is 135285079. The next prime is 135285089. The reversal of 135285081 is 180582531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180582531 = 3 ⋅60194177.

It is a cyclic number.

It is not a de Polignac number, because 135285081 - 2¹ = 135285079 is a prime.

It is a super-2 number, since 2×135285081² = 36604106282353122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135285089) 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, 22547511 + ... + 22547516.

It is an arithmetic number, because the mean of its divisors is an integer number (45095028).

Almost surely, 2^135285081 is an apocalyptic number.

It is an amenable number.

135285081 is a deficient number, since it is larger than the sum of its proper divisors (45095031).

135285081 is an equidigital number, since it uses as much as digits as its factorization.

135285081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45095030.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 135285081 is about 11631.2115018170. The cubic root of 135285081 is about 513.3536276435.

The spelling of 135285081 in words is "one hundred thirty-five million, two hundred eighty-five thousand, eighty-one".