42566321 has 8 divisors (see below), whose sum is σ = 48737280. Its totient is φ = 36417888.

The previous prime is 42566281. The next prime is 42566339. The reversal of 42566321 is 12366524.

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

It is a cyclic number.

It is not a de Polignac number, because 42566321 - 2⁶ = 42566257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42566341) 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, 1361 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (6092160).

Almost surely, 2^42566321 is an apocalyptic number.

It is an amenable number.

42566321 is a deficient number, since it is larger than the sum of its proper divisors (6170959).

42566321 is a wasteful number, since it uses less digits than its factorization.

42566321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11263.

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

The square root of 42566321 is about 6524.2870108541. The cubic root of 42566321 is about 349.1580333159.

The spelling of 42566321 in words is "forty-two million, five hundred sixty-six thousand, three hundred twenty-one".