80642 has 8 divisors (see below), whose sum is σ = 123132. Its totient is φ = 39600.

The previous prime is 80629. The next prime is 80651. The reversal of 80642 is 24608.

It can be written as a sum of positive squares in 2 ways, for example, as 78961 + 1681 = 281^2 + 41^2 .

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

It is an Ulam number.

It is an unprimeable number.

80642 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 3 ways as a sum of consecutive naturals, for example, 209 + ... + 452.

2⁸⁰⁶⁴² is an apocalyptic number.

80642 is a deficient number, since it is larger than the sum of its proper divisors (42490).

80642 is a wasteful number, since it uses less digits than its factorization.

80642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 80642 is about 283.9753510430. The cubic root of 80642 is about 43.2036490973.

It can be divided in two parts, 806 and 42, that added together give a palindrome (848).

The spelling of 80642 in words is "eighty thousand, six hundred forty-two".