65240143 has 8 divisors (see below), whose sum is σ = 66976560. Its totient is φ = 63510720.

The previous prime is 65240137. The next prime is 65240177. The reversal of 65240143 is 34104256.

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 65240143 - 2⁹ = 65239631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65240113) 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, 20973 + ... + 23881.

It is an arithmetic number, because the mean of its divisors is an integer number (8372070).

Almost surely, 2^65240143 is an apocalyptic number.

65240143 is a deficient number, since it is larger than the sum of its proper divisors (1736417).

65240143 is a wasteful number, since it uses less digits than its factorization.

65240143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497.

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

The square root of 65240143 is about 8077.1370546748. The cubic root of 65240143 is about 402.5671207328.

Adding to 65240143 its reverse (34104256), we get a palindrome (99344399).

The spelling of 65240143 in words is "sixty-five million, two hundred forty thousand, one hundred forty-three".