65442 has 16 divisors (see below), whose sum is σ = 141120. Its totient is φ = 20112.

The previous prime is 65437. The next prime is 65447. The reversal of 65442 is 24456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65437) and next prime (65447).

It is a plaindrome in base 15.

It is a nialpdrome in base 10 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65442.

It is not an unprimeable number, because it can be changed into a prime (65447) by changing a digit.

65442 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 497.

It is an arithmetic number, because the mean of its divisors is an integer number (8820).

2⁶⁵⁴⁴² is an apocalyptic number.

65442 is an abundant number, since it is smaller than the sum of its proper divisors (75678).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70560).

65442 is a wasteful number, since it uses less digits than its factorization.

65442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857.

The product of its digits is 960, while the sum is 21.

The square root of 65442 is about 255.8163403694. The cubic root of 65442 is about 40.2981882373.

Adding to 65442 its reverse (24456), we get a palindrome (89898).

It can be divided in two parts, 654 and 42, that added together give a palindrome (696).

The spelling of 65442 in words is "sixty-five thousand, four hundred forty-two".