42430561 has 6 divisors (see below), whose sum is σ = 44356130. Its totient is φ = 40585248.

The previous prime is 42430543. The next prime is 42430571. The reversal of 42430561 is 16503424.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 15649936 = 5175^2 + 3956^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42430561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42430511) 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 5 ways as a sum of consecutive naturals, for example, 39576 + ... + 40633.

Almost surely, 2^42430561 is an apocalyptic number.

It is an amenable number.

42430561 is a deficient number, since it is larger than the sum of its proper divisors (1925569).

42430561 is an equidigital number, since it uses as much as digits as its factorization.

42430561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80255 (or 80232 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 42430561 is about 6513.8744998657. The cubic root of 42430561 is about 348.7864392409.

Adding to 42430561 its reverse (16503424), we get a palindrome (58933985).

The spelling of 42430561 in words is "forty-two million, four hundred thirty thousand, five hundred sixty-one".