346681 has 4 divisors (see below), whose sum is σ = 367092. Its totient is φ = 326272.

The previous prime is 346669. The next prime is 346699. The reversal of 346681 is 186643.

346681 = 84² + 85² + ... + 117².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186643 = 17 ⋅10979.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 116281 = 480^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 346681 - 2⁵ = 346649 is a prime.

It is a super-2 number, since 2×346681² = 240375431522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346601) 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, 10180 + ... + 10213.

It is an arithmetic number, because the mean of its divisors is an integer number (91773).

2³⁴⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

346681 is a deficient number, since it is larger than the sum of its proper divisors (20411).

346681 is a wasteful number, since it uses less digits than its factorization.

346681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20410.

The product of its digits is 3456, while the sum is 28.

The square root of 346681 is about 588.7962296075. The cubic root of 346681 is about 70.2495176911.

The spelling of 346681 in words is "three hundred forty-six thousand, six hundred eighty-one".