42561322 has 8 divisors (see below), whose sum is σ = 65567556. Its totient is φ = 20705472.

The previous prime is 42561307. The next prime is 42561331. The reversal of 42561322 is 22316524.

42561322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35533521 + 7027801 = 5961^2 + 2651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42561322² = 3622932260775368, which contains 22 as substring.

It is an unprimeable number.

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, 287503 + ... + 287650.

Almost surely, 2^42561322 is an apocalyptic number.

42561322 is a deficient number, since it is larger than the sum of its proper divisors (23006234).

42561322 is a wasteful number, since it uses less digits than its factorization.

42561322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575192.

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

The square root of 42561322 is about 6523.9038926091. The cubic root of 42561322 is about 349.1443643768.

Adding to 42561322 its reverse (22316524), we get a palindrome (64877846).

The spelling of 42561322 in words is "forty-two million, five hundred sixty-one thousand, three hundred twenty-two".