68642 has 8 divisors (see below), whose sum is σ = 117696. Its totient is φ = 29412.

The previous prime is 68639. The next prime is 68659. The reversal of 68642 is 24686.

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

It is a d-powerful number, because it can be written as 6⁴ + 8³ + 6⁴ + 4⁸ + 2 .

It is an unprimeable number.

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, 2438 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (14712).

2⁶⁸⁶⁴² is an apocalyptic number.

68642 is a deficient number, since it is larger than the sum of its proper divisors (49054).

68642 is a wasteful number, since it uses less digits than its factorization.

68642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912.

The product of its digits is 2304, while the sum is 26.

The square root of 68642 is about 261.9961831783. The cubic root of 68642 is about 40.9446009670.

Subtracting from 68642 its reverse (24686), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 68642 in words is "sixty-eight thousand, six hundred forty-two".