4015855 has 4 divisors (see below), whose sum is σ = 4819032. Its totient is φ = 3212680.

The previous prime is 4015841. The next prime is 4015873. The reversal of 4015855 is 5585104.

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

It is a de Polignac number, because none of the positive numbers 2^k-4015855 is a prime.

It is a super-2 number, since 2×4015855² = 32254182762050, which contains 22 as substring.

It is a Duffinian number.

4015855 is a lucky number.

It is a congruent number.

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, 401581 + ... + 401590.

It is an arithmetic number, because the mean of its divisors is an integer number (1204758).

Almost surely, 2^4015855 is an apocalyptic number.

4015855 is a deficient number, since it is larger than the sum of its proper divisors (803177).

4015855 is an equidigital number, since it uses as much as digits as its factorization.

4015855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803176.

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

The square root of 4015855 is about 2003.9598299367. The cubic root of 4015855 is about 158.9495640566.

The spelling of 4015855 in words is "four million, fifteen thousand, eight hundred fifty-five".