65021 has 8 divisors (see below), whose sum is σ = 74304. Its totient is φ = 56320.

The previous prime is 65011. The next prime is 65027. The reversal of 65021 is 12056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65021 - 2¹⁰ = 63997 is a prime.

It is a Duffinian number.

65021 is an undulating number in base 16.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64987 and 65005.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65021.

It is not an unprimeable number, because it can be changed into a prime (65027) 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, 125 + ... + 381.

It is an arithmetic number, because the mean of its divisors is an integer number (9288).

2⁶⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

65021 is a deficient number, since it is larger than the sum of its proper divisors (9283).

65021 is a wasteful number, since it uses less digits than its factorization.

65021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 65021 is about 254.9921567421. The cubic root of 65021 is about 40.2115871320.

Adding to 65021 its reverse (12056), we get a palindrome (77077).

The spelling of 65021 in words is "sixty-five thousand, twenty-one".