135242784 has 60 divisors (see below), whose sum is σ = 397752894. Its totient is φ = 45080064.

The previous prime is 135242759. The next prime is 135242791. The reversal of 135242784 is 487242531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 135210384 + 32400 = 11628^2 + 180^2 .

It is a super-2 number, since 2×135242784² = 36581221248141312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23497 + ... + 28680.

Almost surely, 2^135242784 is an apocalyptic number.

It is an amenable number.

135242784 is an abundant number, since it is smaller than the sum of its proper divisors (262510110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135242784 is an equidigital number, since it uses as much as digits as its factorization.

135242784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52199 (or 52182 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 135242784 is about 11629.3931054032. The cubic root of 135242784 is about 513.3001219120.

The spelling of 135242784 in words is "one hundred thirty-five million, two hundred forty-two thousand, seven hundred eighty-four".