678254 has 4 divisors (see below), whose sum is σ = 1017384. Its totient is φ = 339126.

The previous prime is 678253. The next prime is 678289. The reversal of 678254 is 452876.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 678254.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678254.

It is not an unprimeable number, because it can be changed into a prime (678253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169562 + ... + 169565.

It is an arithmetic number, because the mean of its divisors is an integer number (254346).

2⁶⁷⁸²⁵⁴ is an apocalyptic number.

678254 is a deficient number, since it is larger than the sum of its proper divisors (339130).

678254 is a wasteful number, since it uses less digits than its factorization.

678254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339129.

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

The square root of 678254 is about 823.5617766749. The cubic root of 678254 is about 87.8612655560.

The spelling of 678254 in words is "six hundred seventy-eight thousand, two hundred fifty-four".