65140243 has 8 divisors (see below), whose sum is σ = 78825312. Its totient is φ = 52550016.

The previous prime is 65140241. The next prime is 65140247. The reversal of 65140243 is 34204156.

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 65140243 - 2¹ = 65140241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65140241) 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, 273580 + ... + 273817.

It is an arithmetic number, because the mean of its divisors is an integer number (9853164).

Almost surely, 2^65140243 is an apocalyptic number.

65140243 is a deficient number, since it is larger than the sum of its proper divisors (13685069).

65140243 is a wasteful number, since it uses less digits than its factorization.

65140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547421.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 65140243 is about 8070.9505635953. The cubic root of 65140243 is about 402.3615366740.

Adding to 65140243 its reverse (34204156), we get a palindrome (99344399).

The spelling of 65140243 in words is "sixty-five million, one hundred forty thousand, two hundred forty-three".