4055815 has 4 divisors (see below), whose sum is σ = 4866984. Its totient is φ = 3244648.

The previous prime is 4055801. The next prime is 4055833. The reversal of 4055815 is 5185504.

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

It is a cyclic number.

It is not a de Polignac number, because 4055815 - 2⁷ = 4055687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 405577 + ... + 405586.

It is an arithmetic number, because the mean of its divisors is an integer number (1216746).

Almost surely, 2^4055815 is an apocalyptic number.

4055815 is a deficient number, since it is larger than the sum of its proper divisors (811169).

4055815 is an equidigital number, since it uses as much as digits as its factorization.

4055815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811168.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 4055815 is about 2013.9054098939. The cubic root of 4055815 is about 159.4750372847.

It can be divided in two parts, 40 and 55815, that added together give a palindrome (55855).

The spelling of 4055815 in words is "four million, fifty-five thousand, eight hundred fifteen".