64542 has 16 divisors (see below), whose sum is σ = 133632. Its totient is φ = 20760.

The previous prime is 64513. The next prime is 64553. The reversal of 64542 is 24546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

64542 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, 13 + ... + 359.

It is an arithmetic number, because the mean of its divisors is an integer number (8352).

2⁶⁴⁵⁴² is an apocalyptic number.

64542 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

64542 is an abundant number, since it is smaller than the sum of its proper divisors (69090).

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 (66816).

64542 is a wasteful number, since it uses less digits than its factorization.

64542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

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

The square root of 64542 is about 254.0511759469. The cubic root of 64542 is about 40.1125994036.

It can be divided in two parts, 64 and 542, that added together give a palindrome (606).

The spelling of 64542 in words is "sixty-four thousand, five hundred forty-two".