680542 has 8 divisors (see below), whose sum is σ = 1074600. Its totient is φ = 322344.

The previous prime is 680539. The next prime is 680567. The reversal of 680542 is 245086.

680542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8917 + ... + 8992.

It is an arithmetic number, because the mean of its divisors is an integer number (134325).

2⁶⁸⁰⁵⁴² is an apocalyptic number.

680542 is a deficient number, since it is larger than the sum of its proper divisors (394058).

680542 is a wasteful number, since it uses less digits than its factorization.

680542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17930.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 680542 is about 824.9496954360. The cubic root of 680542 is about 87.9599507844.

The spelling of 680542 in words is "six hundred eighty thousand, five hundred forty-two".