42051505 has 4 divisors (see below), whose sum is σ = 50461812. Its totient is φ = 33641200.

The previous prime is 42051491. The next prime is 42051517. The reversal of 42051505 is 50515024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4511376 + 37540129 = 2124^2 + 6127^2 .

It is not a de Polignac number, because 42051505 - 2¹¹ = 42049457 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 4205146 + ... + 4205155.

It is an arithmetic number, because the mean of its divisors is an integer number (12615453).

Almost surely, 2^42051505 is an apocalyptic number.

It is an amenable number.

42051505 is a deficient number, since it is larger than the sum of its proper divisors (8410307).

42051505 is an equidigital number, since it uses as much as digits as its factorization.

42051505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410306.

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

The square root of 42051505 is about 6484.7131779285. The cubic root of 42051505 is about 347.7446959323.

Adding to 42051505 its reverse (50515024), we get a palindrome (92566529).

The spelling of 42051505 in words is "forty-two million, fifty-one thousand, five hundred five".