681145 has 8 divisors (see below), whose sum is σ = 853056. Its totient is φ = 521136.

The previous prime is 681137. The next prime is 681151. The reversal of 681145 is 541186.

681145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681145 - 2³ = 681137 is a prime.

It is a super-2 number, since 2×681145² = 927917022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2847 + ... + 3076.

It is an arithmetic number, because the mean of its divisors is an integer number (106632).

2⁶⁸¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

681145 is a deficient number, since it is larger than the sum of its proper divisors (171911).

681145 is a wasteful number, since it uses less digits than its factorization.

681145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951.

The product of its digits is 960, while the sum is 25.

The square root of 681145 is about 825.3150913439. The cubic root of 681145 is about 87.9859223348.

The spelling of 681145 in words is "six hundred eighty-one thousand, one hundred forty-five".