134442 has 48 divisors (see below), whose sum is σ = 366912. Its totient is φ = 34560.

The previous prime is 134437. The next prime is 134443. The reversal of 134442 is 244431.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134443) by changing a digit.

134442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 23 ways as a sum of consecutive naturals, for example, 1338 + ... + 1434.

It is an arithmetic number, because the mean of its divisors is an integer number (7644).

2¹³⁴⁴⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183456).

134442 is an abundant number, since it is smaller than the sum of its proper divisors (232470).

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

134442 is a wasteful number, since it uses less digits than its factorization.

134442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 120 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 134442 is about 366.6633333182. The cubic root of 134442 is about 51.2285017903.

Adding to 134442 its reverse (244431), we get a palindrome (378873).

It can be divided in two parts, 134 and 442, that added together give a square (576 = 24²).

The spelling of 134442 in words is "one hundred thirty-four thousand, four hundred forty-two".