4004855 has 4 divisors (see below), whose sum is σ = 4805832. Its totient is φ = 3203880.

The previous prime is 4004851. The next prime is 4004867. The reversal of 4004855 is 5584004.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4004855 - 2² = 4004851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400481 + ... + 400490.

It is an arithmetic number, because the mean of its divisors is an integer number (1201458).

Almost surely, 2^4004855 is an apocalyptic number.

4004855 is a deficient number, since it is larger than the sum of its proper divisors (800977).

4004855 is an equidigital number, since it uses as much as digits as its factorization.

4004855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800976.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4004855 is about 2001.2133819261. The cubic root of 4004855 is about 158.8043028314.

Adding to 4004855 its reverse (5584004), we get a palindrome (9588859).

The spelling of 4004855 in words is "four million, four thousand, eight hundred fifty-five".