48021 has 4 divisors (see below), whose sum is σ = 64032. Its totient is φ = 32012.

The previous prime is 48017. The next prime is 48023. The reversal of 48021 is 12084.

48021 = 69² + 70² + ... + 77².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 48021 - 2² = 48017 is a prime.

It is a D-number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8001 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (16008).

2⁴⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

48021 is a deficient number, since it is larger than the sum of its proper divisors (16011).

48021 is a wasteful number, since it uses less digits than its factorization.

48021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16010.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 48021 is about 219.1369434851. The cubic root of 48021 is about 36.3477110190.

Subtracting from 48021 its reverse (12084), we obtain a cube (35937 = 33³).

The spelling of 48021 in words is "forty-eight thousand, twenty-one".