340581 has 8 divisors (see below), whose sum is σ = 458784. Its totient is φ = 224720.

The previous prime is 340579. The next prime is 340583. The reversal of 340581 is 185043.

340581 is nontrivially palindromic in base 2 and base 15.

It is an interprime number because it is at equal distance from previous prime (340579) and next prime (340583).

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 340581 - 2¹ = 340579 is a prime.

It is a super-2 number, since 2×340581² = 231990835122, which contains 22 as substring.

It is a zygodrome in base 6.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340581.

It is not an unprimeable number, because it can be changed into a prime (340583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (57348).

2³⁴⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

340581 is a deficient number, since it is larger than the sum of its proper divisors (118203).

340581 is a wasteful number, since it uses less digits than its factorization.

340581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 340581 is about 583.5931802206. The cubic root of 340581 is about 69.8350538072.

It can be divided in two parts, 3405 and 81, that added together give a triangular number (3486 = T₈₃).

The spelling of 340581 in words is "three hundred forty thousand, five hundred eighty-one".