48721 has 4 divisors (see below), whose sum is σ = 49392. Its totient is φ = 48052.

The previous prime is 48679. The next prime is 48731. The reversal of 48721 is 12784.

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 48721 - 2⁷ = 48593 is a prime.

It is a Duffinian number.

48721 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 48692 and 48701.

It is not an unprimeable number, because it can be changed into a prime (48731) 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, 211 + ... + 376.

It is an arithmetic number, because the mean of its divisors is an integer number (12348).

2⁴⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

48721 is a deficient number, since it is larger than the sum of its proper divisors (671).

48721 is an equidigital number, since it uses as much as digits as its factorization.

48721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670.

The product of its digits is 448, while the sum is 22.

The square root of 48721 is about 220.7283398207. The cubic root of 48721 is about 36.5234727356.

Subtracting from 48721 its reverse (12784), we obtain a cube (35937 = 33³).

The spelling of 48721 in words is "forty-eight thousand, seven hundred twenty-one".