681478 has 8 divisors (see below), whose sum is σ = 1168272. Its totient is φ = 292056.

The previous prime is 681451. The next prime is 681481. The reversal of 681478 is 874186.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24325 + ... + 24352.

It is an arithmetic number, because the mean of its divisors is an integer number (146034).

681478 is a Friedman number, since it can be written as 88^(7-4*1)+6, using all its digits and the basic arithmetic operations.

2⁶⁸¹⁴⁷⁸ is an apocalyptic number.

681478 is a deficient number, since it is larger than the sum of its proper divisors (486794).

681478 is a wasteful number, since it uses less digits than its factorization.

681478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48686.

The product of its digits is 10752, while the sum is 34.

The square root of 681478 is about 825.5168078240. The cubic root of 681478 is about 88.0002582637. Note that the first 3 decimals are identical.

The spelling of 681478 in words is "six hundred eighty-one thousand, four hundred seventy-eight".