678042 has 24 divisors (see below), whose sum is σ = 1485120. Its totient is φ = 223560.

The previous prime is 678037. The next prime is 678047. The reversal of 678042 is 240876.

It is an interprime number because it is at equal distance from previous prime (678037) and next prime (678047).

It is a junction number, because it is equal to n+sod(n) for n = 677997 and 678015.

It is not an unprimeable number, because it can be changed into a prime (678047) by changing a digit.

678042 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 11 ways as a sum of consecutive naturals, for example, 2367 + ... + 2637.

It is an arithmetic number, because the mean of its divisors is an integer number (61880).

2⁶⁷⁸⁰⁴² is an apocalyptic number.

678042 is an abundant number, since it is smaller than the sum of its proper divisors (807078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678042 is a wasteful number, since it uses less digits than its factorization.

678042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 678042 is about 823.4330573884. The cubic root of 678042 is about 87.8521104168.

The spelling of 678042 in words is "six hundred seventy-eight thousand, forty-two".