681548 has 24 divisors (see below), whose sum is σ = 1382304. Its totient is φ = 288000.

The previous prime is 681539. The next prime is 681557. The reversal of 681548 is 845186.

It is an interprime number because it is at equal distance from previous prime (681539) and next prime (681557).

It is a super-3 number, since 3×681548³ = 949752833308915776, which contains 333 as substring.

It is an Ulam number.

It is an unprimeable number.

681548 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 7 ways as a sum of consecutive naturals, for example, 2708 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (57596).

2⁶⁸¹⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

681548 is an abundant number, since it is smaller than the sum of its proper divisors (700756).

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

681548 is a wasteful number, since it uses less digits than its factorization.

681548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 351 counting only the distinct ones).

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

The square root of 681548 is about 825.5592044184. The cubic root of 681548 is about 88.0032712283.

The spelling of 681548 in words is "six hundred eighty-one thousand, five hundred forty-eight".