340242321 has 8 divisors (see below), whose sum is σ = 461345760. Its totient is φ = 222983552.

The previous prime is 340242257. The next prime is 340242361. The reversal of 340242321 is 123242043.

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 340242321 - 2⁶ = 340242257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (340242361) 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, 960960 + ... + 961313.

It is an arithmetic number, because the mean of its divisors is an integer number (57668220).

Almost surely, 2^340242321 is an apocalyptic number.

It is an amenable number.

340242321 is a deficient number, since it is larger than the sum of its proper divisors (121103439).

340242321 is a wasteful number, since it uses less digits than its factorization.

340242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922335.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340242321 is about 18445.6585949106. The cubic root of 340242321 is about 698.1189777836.

Adding to 340242321 its reverse (123242043), we get a palindrome (463484364).

The spelling of 340242321 in words is "three hundred forty million, two hundred forty-two thousand, three hundred twenty-one".