4021779 has 8 divisors (see below), whose sum is σ = 5380560. Its totient is φ = 2672096.

The previous prime is 4021777. The next prime is 4021867. The reversal of 4021779 is 9771204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4021779 - 2¹ = 4021777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4021777) 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 7 ways as a sum of consecutive naturals, for example, 1164 + ... + 3065.

It is an arithmetic number, because the mean of its divisors is an integer number (672570).

Almost surely, 2^4021779 is an apocalyptic number.

4021779 is a deficient number, since it is larger than the sum of its proper divisors (1358781).

4021779 is a wasteful number, since it uses less digits than its factorization.

4021779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4549.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 4021779 is about 2005.4373587824. The cubic root of 4021779 is about 159.0276839577.

The spelling of 4021779 in words is "four million, twenty-one thousand, seven hundred seventy-nine".