681458 has 8 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 335860.

The previous prime is 681451. The next prime is 681481. The reversal of 681458 is 854186.

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 (681451) 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, 2258 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (129600).

2⁶⁸¹⁴⁵⁸ is an apocalyptic number.

681458 is a deficient number, since it is larger than the sum of its proper divisors (355342).

681458 is a wasteful number, since it uses less digits than its factorization.

681458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872.

The product of its digits is 7680, while the sum is 32.

The square root of 681458 is about 825.5046941114. The cubic root of 681458 is about 87.9993973788. Note that the first 3 decimals are identical.

The spelling of 681458 in words is "six hundred eighty-one thousand, four hundred fifty-eight".