4040555 has 4 divisors (see below), whose sum is σ = 4848672. Its totient is φ = 3232440.

The previous prime is 4040549. The next prime is 4040563. The reversal of 4040555 is 5550404.

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

It is not a de Polignac number, because 4040555 - 2⁸ = 4040299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4040555.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404051 + ... + 404060.

It is an arithmetic number, because the mean of its divisors is an integer number (1212168).

Almost surely, 2^4040555 is an apocalyptic number.

4040555 is a deficient number, since it is larger than the sum of its proper divisors (808117).

4040555 is an equidigital number, since it uses as much as digits as its factorization.

4040555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808116.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 4040555 is about 2010.1131808931. The cubic root of 4040555 is about 159.2747776911.

Adding to 4040555 its reverse (5550404), we get a palindrome (9590959).

The spelling of 4040555 in words is "four million, forty thousand, five hundred fifty-five".