4048721 has 4 divisors (see below), whose sum is σ = 4134912. Its totient is φ = 3962532.

The previous prime is 4048711. The next prime is 4048727. The reversal of 4048721 is 1278404.

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 4048721 - 2¹⁰ = 4047697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4048727) 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 in 3 ways as a sum of consecutive naturals, for example, 43025 + ... + 43118.

It is an arithmetic number, because the mean of its divisors is an integer number (1033728).

Almost surely, 2^4048721 is an apocalyptic number.

It is an amenable number.

4048721 is a deficient number, since it is larger than the sum of its proper divisors (86191).

4048721 is an equidigital number, since it uses as much as digits as its factorization.

4048721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86190.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 4048721 is about 2012.1433845529. The cubic root of 4048721 is about 159.3820041007.

The spelling of 4048721 in words is "four million, forty-eight thousand, seven hundred twenty-one".