135974 has 4 divisors (see below), whose sum is σ = 203964. Its totient is φ = 67986.

The previous prime is 135937. The next prime is 135977. The reversal of 135974 is 479531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479531 = 13 ⋅36887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33992 + ... + 33995.

It is an arithmetic number, because the mean of its divisors is an integer number (50991).

2¹³⁵⁹⁷⁴ is an apocalyptic number.

135974 is a deficient number, since it is larger than the sum of its proper divisors (67990).

135974 is an equidigital number, since it uses as much as digits as its factorization.

135974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67989.

The product of its digits is 3780, while the sum is 29.

The square root of 135974 is about 368.7465254074. The cubic root of 135974 is about 51.4223544807.

The spelling of 135974 in words is "one hundred thirty-five thousand, nine hundred seventy-four".