260643 has 8 divisors (see below), whose sum is σ = 349888. Its totient is φ = 172584.

The previous prime is 260629. The next prime is 260647. The reversal of 260643 is 346062.

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

It is not a de Polignac number, because 260643 - 2⁸ = 260387 is a prime.

It is a Duffinian number.

260643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (260647) 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 7 ways as a sum of consecutive naturals, for example, 696 + ... + 1002.

It is an arithmetic number, because the mean of its divisors is an integer number (43736).

2²⁶⁰⁶⁴³ is an apocalyptic number.

260643 is a deficient number, since it is larger than the sum of its proper divisors (89245).

260643 is a wasteful number, since it uses less digits than its factorization.

260643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 260643 is about 510.5320753880. The cubic root of 260643 is about 63.8776144216.

It can be divided in two parts, 260 and 643, that added together give a triangular number (903 = T₄₂).

The spelling of 260643 in words is "two hundred sixty thousand, six hundred forty-three".