48042721 has 2 divisors, whose sum is σ = 48042722. Its totient is φ = 48042720.

The previous prime is 48042719. The next prime is 48042767. The reversal of 48042721 is 12724084.

48042721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28998225 + 19044496 = 5385^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 48042721 - 2¹ = 48042719 is a prime.

Together with 48042719, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 48042721.

It is not a weakly prime, because it can be changed into another prime (48042781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24021360 + 24021361.

It is an arithmetic number, because the mean of its divisors is an integer number (24021361).

Almost surely, 2^48042721 is an apocalyptic number.

It is an amenable number.

48042721 is a deficient number, since it is larger than the sum of its proper divisors (1).

48042721 is an equidigital number, since it uses as much as digits as its factorization.

48042721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 48042721 is about 6931.2856671760. The cubic root of 48042721 is about 363.5319049410.

The spelling of 48042721 in words is "forty-eight million, forty-two thousand, seven hundred twenty-one".