65642 has 8 divisors (see below), whose sum is σ = 102816. Its totient is φ = 31372.

The previous prime is 65633. The next prime is 65647. The reversal of 65642 is 24656.

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (65647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (12852).

2⁶⁵⁶⁴² is an apocalyptic number.

65642 is a deficient number, since it is larger than the sum of its proper divisors (37174).

65642 is a wasteful number, since it uses less digits than its factorization.

65642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its digits is 1440, while the sum is 23.

The square root of 65642 is about 256.2069476029. The cubic root of 65642 is about 40.3391988070.

It can be divided in two parts, 65 and 642, that added together give a palindrome (707).

The spelling of 65642 in words is "sixty-five thousand, six hundred forty-two".