4042155 has 32 divisors (see below), whose sum is σ = 7338240. Its totient is φ = 1883520.

The previous prime is 4042153. The next prime is 4042163. The reversal of 4042155 is 5512404.

It is not a de Polignac number, because 4042155 - 2¹ = 4042153 is a prime.

It is an Ulam number.

4042155 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3160 + ... + 4250.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^4042155 is an apocalyptic number.

4042155 is a deficient number, since it is larger than the sum of its proper divisors (3296085).

4042155 is a wasteful number, since it uses less digits than its factorization.

4042155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 4042155 is about 2010.5111290416. The cubic root of 4042155 is about 159.2957984019.

Adding to 4042155 its reverse (5512404), we get a palindrome (9554559).

It can be divided in two parts, 40 and 42155, that added together give a triangular number (42195 = T₂₉₀).

The spelling of 4042155 in words is "four million, forty-two thousand, one hundred fifty-five".