422603561 has 4 divisors (see below), whose sum is σ = 447462612. Its totient is φ = 397744512.

The previous prime is 422603557. The next prime is 422603579. The reversal of 422603561 is 165306224.

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 346146025 + 76457536 = 18605^2 + 8744^2 .

It is not a de Polignac number, because 422603561 - 2² = 422603557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422603581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12429500 + ... + 12429533.

It is an arithmetic number, because the mean of its divisors is an integer number (111865653).

Almost surely, 2^422603561 is an apocalyptic number.

It is an amenable number.

422603561 is a deficient number, since it is larger than the sum of its proper divisors (24859051).

422603561 is a wasteful number, since it uses less digits than its factorization.

422603561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24859050.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 422603561 is about 20557.3237801033. The cubic root of 422603561 is about 750.4314915576.

Adding to 422603561 its reverse (165306224), we get a palindrome (587909785).

The spelling of 422603561 in words is "four hundred twenty-two million, six hundred three thousand, five hundred sixty-one".