42561323 has 8 divisors (see below), whose sum is σ = 48845280. Its totient is φ = 36328320.

The previous prime is 42561307. The next prime is 42561331. The reversal of 42561323 is 32316524.

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

It is not a de Polignac number, because 42561323 - 2⁴ = 42561307 is a prime.

It is a super-2 number, since 2×42561323² = 3622932431020658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42561292 and 42561301.

It is not an unprimeable number, because it can be changed into a prime (42561223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10928 + ... + 14301.

It is an arithmetic number, because the mean of its divisors is an integer number (6105660).

Almost surely, 2^42561323 is an apocalyptic number.

42561323 is a deficient number, since it is larger than the sum of its proper divisors (6283957).

42561323 is a wasteful number, since it uses less digits than its factorization.

42561323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25477.

The product of its digits is 4320, while the sum is 26.

The square root of 42561323 is about 6523.9039692503. The cubic root of 42561323 is about 349.1443671113.

Adding to 42561323 its reverse (32316524), we get a palindrome (74877847).

The spelling of 42561323 in words is "forty-two million, five hundred sixty-one thousand, three hundred twenty-three".