4395921 has 8 divisors (see below), whose sum is σ = 6116160. Its totient is φ = 2803152.

The previous prime is 4395917. The next prime is 4395949. The reversal of 4395921 is 1295934.

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

It is not a de Polignac number, because 4395921 - 2² = 4395917 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4395221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31786 + ... + 31923.

It is an arithmetic number, because the mean of its divisors is an integer number (764520).

Almost surely, 2^4395921 is an apocalyptic number.

It is an amenable number.

4395921 is a deficient number, since it is larger than the sum of its proper divisors (1720239).

4395921 is a wasteful number, since it uses less digits than its factorization.

4395921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63735.

The product of its digits is 9720, while the sum is 33.

The square root of 4395921 is about 2096.6451774203. The cubic root of 4395921 is about 163.8136019273.

The spelling of 4395921 in words is "four million, three hundred ninety-five thousand, nine hundred twenty-one".