65240243 has 8 divisors (see below), whose sum is σ = 69355920. Its totient is φ = 61192800.

The previous prime is 65240209. The next prime is 65240249. The reversal of 65240243 is 34204256.

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 65240243 - 2¹⁰ = 65239219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65240249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15080 + ... + 18917.

It is an arithmetic number, because the mean of its divisors is an integer number (8669490).

Almost surely, 2^65240243 is an apocalyptic number.

65240243 is a deficient number, since it is larger than the sum of its proper divisors (4115677).

65240243 is a wasteful number, since it uses less digits than its factorization.

65240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34117.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 65240243 is about 8077.1432449846. The cubic root of 65240243 is about 402.5673264175.

Adding to 65240243 its reverse (34204256), we get a palindrome (99444499).

The spelling of 65240243 in words is "sixty-five million, two hundred forty thousand, two hundred forty-three".