42303505 has 4 divisors (see below), whose sum is σ = 50764212. Its totient is φ = 33842800.

The previous prime is 42303491. The next prime is 42303511. The reversal of 42303505 is 50530324.

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 21836929 + 20466576 = 4673^2 + 4524^2 .

It is not a de Polignac number, because 42303505 - 2⁷ = 42303377 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4230346 + ... + 4230355.

It is an arithmetic number, because the mean of its divisors is an integer number (12691053).

Almost surely, 2^42303505 is an apocalyptic number.

It is an amenable number.

42303505 is a deficient number, since it is larger than the sum of its proper divisors (8460707).

42303505 is an equidigital number, since it uses as much as digits as its factorization.

42303505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8460706.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 42303505 is about 6504.1144670124. The cubic root of 42303505 is about 348.4379505112.

Adding to 42303505 its reverse (50530324), we get a palindrome (92833829).

The spelling of 42303505 in words is "forty-two million, three hundred three thousand, five hundred five".