681485 has 8 divisors (see below), whose sum is σ = 934656. Its totient is φ = 467280.

The previous prime is 681481. The next prime is 681487. The reversal of 681485 is 584186.

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

It is not a de Polignac number, because 681485 - 2² = 681481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9701 + ... + 9770.

It is an arithmetic number, because the mean of its divisors is an integer number (116832).

2⁶⁸¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

681485 is a deficient number, since it is larger than the sum of its proper divisors (253171).

681485 is a wasteful number, since it uses less digits than its factorization.

681485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19483.

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

The square root of 681485 is about 825.5210475815. The cubic root of 681485 is about 88.0005595694. Note that the first 3 decimals are identical.

The spelling of 681485 in words is "six hundred eighty-one thousand, four hundred eighty-five".