65291 has 4 divisors (see below), whose sum is σ = 66000. Its totient is φ = 64584.

The previous prime is 65287. The next prime is 65293. The reversal of 65291 is 19256.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65291 - 2² = 65287 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65291.

It is not an unprimeable number, because it can be changed into a prime (65293) by changing a digit.

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, 191 + ... + 408.

It is an arithmetic number, because the mean of its divisors is an integer number (16500).

2⁶⁵²⁹¹ is an apocalyptic number.

65291 is a deficient number, since it is larger than the sum of its proper divisors (709).

65291 is a wasteful number, since it uses less digits than its factorization.

65291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its digits is 540, while the sum is 23.

The square root of 65291 is about 255.5210363160. The cubic root of 65291 is about 40.2671698669.

It can be divided in two parts, 65 and 291, that multiplied together give a triangular number (18915 = T₁₉₄).

The spelling of 65291 in words is "sixty-five thousand, two hundred ninety-one".