42162505 has 32 divisors (see below), whose sum is σ = 63786240. Its totient is φ = 25989120.

The previous prime is 42162503. The next prime is 42162517. The reversal of 42162505 is 50526124.

It is not a de Polignac number, because 42162505 - 2¹ = 42162503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42162505.

It is not an unprimeable number, because it can be changed into a prime (42162503) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 36781 + ... + 37909.

It is an arithmetic number, because the mean of its divisors is an integer number (1993320).

Almost surely, 2^42162505 is an apocalyptic number.

It is an amenable number.

42162505 is a deficient number, since it is larger than the sum of its proper divisors (21623735).

42162505 is a wasteful number, since it uses less digits than its factorization.

42162505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 42162505 is about 6493.2661273045. The cubic root of 42162505 is about 348.0503984127.

Adding to 42162505 its reverse (50526124), we get a palindrome (92688629).

It can be divided in two parts, 421 and 62505, that added together give a palindrome (62926).

The spelling of 42162505 in words is "forty-two million, one hundred sixty-two thousand, five hundred five".