678249 has 48 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 345600.

The previous prime is 678229. The next prime is 678253. The reversal of 678249 is 942876.

678249 is nontrivially palindromic in base 7.

678249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678249 - 2⁵ = 678217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21864 + ... + 21894.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2⁶⁷⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

678249 is a deficient number, since it is larger than the sum of its proper divisors (579735).

678249 is a wasteful number, since it uses less digits than its factorization.

678249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 75 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 678249 is about 823.5587410744. The cubic root of 678249 is about 87.8610496549.

The spelling of 678249 in words is "six hundred seventy-eight thousand, two hundred forty-nine".