42005155 has 16 divisors (see below), whose sum is σ = 52233984. Its totient is φ = 32394240.

The previous prime is 42005081. The next prime is 42005167. The reversal of 42005155 is 55150024.

It is not a de Polignac number, because 42005155 - 2¹³ = 41996963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70539 + ... + 71131.

It is an arithmetic number, because the mean of its divisors is an integer number (3264624).

Almost surely, 2^42005155 is an apocalyptic number.

42005155 is a deficient number, since it is larger than the sum of its proper divisors (10228829).

42005155 is a wasteful number, since it uses less digits than its factorization.

42005155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 42005155 is about 6481.1384030894. The cubic root of 42005155 is about 347.6168852698.

Adding to 42005155 its reverse (55150024), we get a palindrome (97155179).

The spelling of 42005155 in words is "forty-two million, five thousand, one hundred fifty-five".