42106505 has 16 divisors (see below), whose sum is σ = 57988224. Its totient is φ = 28752000.

The previous prime is 42106499. The next prime is 42106513. The reversal of 42106505 is 50560124.

It is not a de Polignac number, because 42106505 - 2⁸ = 42106249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6389 + ... + 11181.

It is an arithmetic number, because the mean of its divisors is an integer number (3624264).

Almost surely, 2^42106505 is an apocalyptic number.

It is an amenable number.

42106505 is a deficient number, since it is larger than the sum of its proper divisors (15881719).

42106505 is a wasteful number, since it uses less digits than its factorization.

42106505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 42106505 is about 6488.9525348857. The cubic root of 42106505 is about 347.8962372855.

Adding to 42106505 its reverse (50560124), we get a palindrome (92666629).

The spelling of 42106505 in words is "forty-two million, one hundred six thousand, five hundred five".