243946 has 8 divisors (see below), whose sum is σ = 368064. Its totient is φ = 121260.

The previous prime is 243931. The next prime is 243953. The reversal of 243946 is 649342.

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

It is a d-powerful number, because it can be written as 2⁹ + 4² + 9³ + 3¹¹ + 4⁸ + 6 .

It is an unprimeable number.

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, 351 + ... + 781.

It is an arithmetic number, because the mean of its divisors is an integer number (46008).

2²⁴³⁹⁴⁶ is an apocalyptic number.

243946 is a deficient number, since it is larger than the sum of its proper divisors (124118).

243946 is a wasteful number, since it uses less digits than its factorization.

243946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its digits is 5184, while the sum is 28.

The square root of 243946 is about 493.9088984823. The cubic root of 243946 is about 62.4833875848.

It can be divided in two parts, 2439 and 46, that added together give a triangular number (2485 = T₇₀).

The spelling of 243946 in words is "two hundred forty-three thousand, nine hundred forty-six".