681024 has 28 divisors (see below), whose sum is σ = 1802384. Its totient is φ = 226944.

The previous prime is 681019. The next prime is 681041. The reversal of 681024 is 420186.

It is a nialpdrome in base 16.

It is an unprimeable number.

681024 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1582 + ... + 1965.

2⁶⁸¹⁰²⁴ is an apocalyptic number.

681024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

681024 is an abundant number, since it is smaller than the sum of its proper divisors (1121360).

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

681024 is a wasteful number, since it uses less digits than its factorization.

681024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 681024 is about 825.2417827522. The cubic root of 681024 is about 87.9807120262.

The spelling of 681024 in words is "six hundred eighty-one thousand, twenty-four".