135778 has 8 divisors (see below), whose sum is σ = 210780. Its totient is φ = 65520.

The previous prime is 135757. The next prime is 135781. The reversal of 135778 is 877531.

It can be written as a sum of positive squares in 2 ways, for example, as 134689 + 1089 = 367^2 + 33^2 .

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

It is a plaindrome in base 10 and base 12.

It is a zygodrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113 + ... + 1228.

2¹³⁵⁷⁷⁸ is an apocalyptic number.

135778 is a deficient number, since it is larger than the sum of its proper divisors (75002).

135778 is a wasteful number, since it uses less digits than its factorization.

135778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372.

The product of its digits is 5880, while the sum is 31.

The square root of 135778 is about 368.4806643502. The cubic root of 135778 is about 51.3976349803.

The spelling of 135778 in words is "one hundred thirty-five thousand, seven hundred seventy-eight".