681146 has 4 divisors (see below), whose sum is σ = 1021722. Its totient is φ = 340572.

The previous prime is 681137. The next prime is 681151. The reversal of 681146 is 641186.

681146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 390625 + 290521 = 625^2 + 539^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170285 + ... + 170288.

2⁶⁸¹¹⁴⁶ is an apocalyptic number.

681146 is a deficient number, since it is larger than the sum of its proper divisors (340576).

681146 is a wasteful number, since it uses less digits than its factorization.

681146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340575.

The product of its digits is 1152, while the sum is 26.

The square root of 681146 is about 825.3156971729. The cubic root of 681146 is about 87.9859653927.

The spelling of 681146 in words is "six hundred eighty-one thousand, one hundred forty-six".