4070721 has 4 divisors (see below), whose sum is σ = 5427632. Its totient is φ = 2713812.

The previous prime is 4070711. The next prime is 4070723. The reversal of 4070721 is 1270704.

4070721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 4070721 - 2¹⁵ = 4037953 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4070723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678451 + ... + 678456.

It is an arithmetic number, because the mean of its divisors is an integer number (1356908).

Almost surely, 2^4070721 is an apocalyptic number.

It is an amenable number.

4070721 is a deficient number, since it is larger than the sum of its proper divisors (1356911).

4070721 is a wasteful number, since it uses less digits than its factorization.

4070721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356910.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 4070721 is about 2017.6027854858. The cubic root of 4070721 is about 159.6701668846.

The spelling of 4070721 in words is "four million, seventy thousand, seven hundred twenty-one".