681147 has 6 divisors (see below), whose sum is σ = 983892. Its totient is φ = 454092.

The previous prime is 681137. The next prime is 681151. The reversal of 681147 is 741186.

It is a happy number.

It is not a de Polignac number, because 681147 - 2⁷ = 681019 is a prime.

It is a super-2 number, since 2×681147² = 927922471218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681147.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681147.

It is not an unprimeable number, because it can be changed into a prime (681127) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 37833 + ... + 37850.

It is an arithmetic number, because the mean of its divisors is an integer number (163982).

2⁶⁸¹¹⁴⁷ is an apocalyptic number.

681147 is a deficient number, since it is larger than the sum of its proper divisors (302745).

681147 is a wasteful number, since it uses less digits than its factorization.

681147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75689 (or 75686 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 681147 is about 825.3163030015. The cubic root of 681147 is about 87.9860084505.

It can be divided in two parts, 68114 and 7, that added together give a square (68121 = 261²).

The spelling of 681147 in words is "six hundred eighty-one thousand, one hundred forty-seven".