135142 has 16 divisors (see below), whose sum is σ = 237600. Its totient is φ = 57624.

The previous prime is 135131. The next prime is 135151. The reversal of 135142 is 241531.

It is a congruent number.

It is an unprimeable number.

135142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588 + ... + 784.

It is an arithmetic number, because the mean of its divisors is an integer number (14850).

2¹³⁵¹⁴² is an apocalyptic number.

135142 is a deficient number, since it is larger than the sum of its proper divisors (102458).

135142 is an equidigital number, since it uses as much as digits as its factorization.

135142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 206 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 135142 is about 367.6166481540. The cubic root of 135142 is about 51.3172585113.

Adding to 135142 its reverse (241531), we get a palindrome (376673).

It can be divided in two parts, 13514 and 2, that multiplied together give a triangular number (27028 = T₂₃₂).

The spelling of 135142 in words is "one hundred thirty-five thousand, one hundred forty-two".