340543 has 4 divisors (see below), whose sum is σ = 389200. Its totient is φ = 291888.

The previous prime is 340541. The next prime is 340559. The reversal of 340543 is 345043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345043 = 389 ⋅887.

It is a cyclic number.

It is not a de Polignac number, because 340543 - 2¹ = 340541 is a prime.

It is a d-powerful number, because it can be written as 3³ + 4 + 5⁷ + 0 + 4⁹ + 3⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 340543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340541) 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 3 ways as a sum of consecutive naturals, for example, 24318 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (97300).

2³⁴⁰⁵⁴³ is an apocalyptic number.

340543 is a deficient number, since it is larger than the sum of its proper divisors (48657).

340543 is an equidigital number, since it uses as much as digits as its factorization.

340543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48656.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 340543 is about 583.5606223864. The cubic root of 340543 is about 69.8324564508.

Adding to 340543 its reverse (345043), we get a palindrome (685586).

The spelling of 340543 in words is "three hundred forty thousand, five hundred forty-three".