4421857 has 4 divisors (see below), whose sum is σ = 4823856. Its totient is φ = 4019860.

The previous prime is 4421849. The next prime is 4421861. The reversal of 4421857 is 7581244.

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 4421857 - 2³ = 4421849 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421897) 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, 200983 + ... + 201004.

It is an arithmetic number, because the mean of its divisors is an integer number (1205964).

Almost surely, 2^4421857 is an apocalyptic number.

It is an amenable number.

4421857 is a deficient number, since it is larger than the sum of its proper divisors (401999).

4421857 is a wasteful number, since it uses less digits than its factorization.

4421857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401998.

The product of its digits is 8960, while the sum is 31.

The square root of 4421857 is about 2102.8212001975. The cubic root of 4421857 is about 164.1351379696.

The spelling of 4421857 in words is "four million, four hundred twenty-one thousand, eight hundred fifty-seven".