681310 has 16 divisors (see below), whose sum is σ = 1401696. Its totient is φ = 233568.

The previous prime is 681293. The next prime is 681311. The reversal of 681310 is 13186.

681310 = T₂₀ + T₂₁ + ... + T₁₅₉.

It is a super-2 number, since 2×681310² = 928366632200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681311) by changing a digit.

681310 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, 4797 + ... + 4936.

It is an arithmetic number, because the mean of its divisors is an integer number (87606).

2⁶⁸¹³¹⁰ is an apocalyptic number.

681310 is an abundant number, since it is smaller than the sum of its proper divisors (720386).

It is a weird number, because it is abundant, but not a pseudoperfect number.

681310 is a wasteful number, since it uses less digits than its factorization.

681310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 681310 is about 825.4150471127. The cubic root of 681310 is about 87.9930263069.

Adding to 681310 its reverse (13186), we get a palindrome (694496).

It can be divided in two parts, 68 and 1310, that added together give a triangular number (1378 = T₅₂).

The spelling of 681310 in words is "six hundred eighty-one thousand, three hundred ten".