681278 has 8 divisors (see below), whose sum is σ = 1100568. Its totient is φ = 314424.

The previous prime is 681271. The next prime is 681293. The reversal of 681278 is 872186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681271) 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 in 3 ways as a sum of consecutive naturals, for example, 13076 + ... + 13127.

It is an arithmetic number, because the mean of its divisors is an integer number (137571).

2⁶⁸¹²⁷⁸ is an apocalyptic number.

681278 is a deficient number, since it is larger than the sum of its proper divisors (419290).

681278 is a wasteful number, since it uses less digits than its factorization.

681278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26218.

The product of its digits is 5376, while the sum is 32.

The square root of 681278 is about 825.3956626976. The cubic root of 681278 is about 87.9916486565.

It can be divided in two parts, 681 and 278, that added together give a palindrome (959).

The spelling of 681278 in words is "six hundred eighty-one thousand, two hundred seventy-eight".