678542 has 8 divisors (see below), whose sum is σ = 1053000. Its totient is φ = 327544.

The previous prime is 678541. The next prime is 678553. The reversal of 678542 is 245876.

678542 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 junction number, because it is equal to n+sod(n) for n = 678499 and 678508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5792 + ... + 5907.

It is an arithmetic number, because the mean of its divisors is an integer number (131625).

2⁶⁷⁸⁵⁴² is an apocalyptic number.

678542 is a deficient number, since it is larger than the sum of its proper divisors (374458).

678542 is a wasteful number, since it uses less digits than its factorization.

678542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11730.

The product of its digits is 13440, while the sum is 32.

The square root of 678542 is about 823.7366083889. The cubic root of 678542 is about 87.8736996706.

The spelling of 678542 in words is "six hundred seventy-eight thousand, five hundred forty-two".