42430505 has 16 divisors (see below), whose sum is σ = 55534080. Its totient is φ = 30932928.

The previous prime is 42430489. The next prime is 42430511. The reversal of 42430505 is 50503424.

It is not a de Polignac number, because 42430505 - 2⁴ = 42430489 is a prime.

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, 1004 + ... + 9266.

It is an arithmetic number, because the mean of its divisors is an integer number (3470880).

Almost surely, 2^42430505 is an apocalyptic number.

It is an amenable number.

42430505 is a deficient number, since it is larger than the sum of its proper divisors (13103575).

42430505 is a wasteful number, since it uses less digits than its factorization.

42430505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8360.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42430505 is about 6513.8702013473. The cubic root of 42430505 is about 348.7862857977.

Adding to 42430505 its reverse (50503424), we get a palindrome (92933929).

The spelling of 42430505 in words is "forty-two million, four hundred thirty thousand, five hundred five".