135678 has 8 divisors (see below), whose sum is σ = 271368. Its totient is φ = 45224.

The previous prime is 135671. The next prime is 135697. The reversal of 135678 is 876531.

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

135678 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 10 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135671) 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, 11301 + ... + 11312.

It is an arithmetic number, because the mean of its divisors is an integer number (33921).

2¹³⁵⁶⁷⁸ is an apocalyptic number.

135678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

135678 is a wasteful number, since it uses less digits than its factorization.

135678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618.

The product of its digits is 5040, while the sum is 30.

The square root of 135678 is about 368.3449470266. The cubic root of 135678 is about 51.3850138246.

The spelling of 135678 in words is "one hundred thirty-five thousand, six hundred seventy-eight".