681464 has 32 divisors (see below), whose sum is σ = 1499520. Its totient is φ = 284256.

The previous prime is 681451. The next prime is 681481. The reversal of 681464 is 464186.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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 681464.

It is an unprimeable number.

681464 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 2267 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (46860).

2⁶⁸¹⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749760).

681464 is an abundant number, since it is smaller than the sum of its proper divisors (818056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681464 is a wasteful number, since it uses less digits than its factorization.

681464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 681464 is about 825.5083282439. The cubic root of 681464 is about 87.9996556460. Note that the first 3 decimals are identical.

The spelling of 681464 in words is "six hundred eighty-one thousand, four hundred sixty-four".