340681 has 4 divisors (see below), whose sum is σ = 371664. Its totient is φ = 309700.

The previous prime is 340661. The next prime is 340687. The reversal of 340681 is 186043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340681 - 2⁵ = 340649 is a prime.

It is a super-2 number, since 2×340681² = 232127087522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15475 + ... + 15496.

It is an arithmetic number, because the mean of its divisors is an integer number (92916).

2³⁴⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

340681 is a deficient number, since it is larger than the sum of its proper divisors (30983).

340681 is a wasteful number, since it uses less digits than its factorization.

340681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30982.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 340681 is about 583.6788500537. The cubic root of 340681 is about 69.8418880326.

It can be divided in two parts, 340 and 681, that multiplied together give a triangular number (231540 = T₆₈₀).

The spelling of 340681 in words is "three hundred forty thousand, six hundred eighty-one".