42616321 has 6 divisors (see below), whose sum is σ = 46842866. Its totient is φ = 38742000.

The previous prime is 42616307. The next prime is 42616333. The reversal of 42616321 is 12361624.

It can be written as a sum of positive squares in only one way, i.e., 27878400 + 14737921 = 5280^2 + 3839^2 .

It is not a de Polignac number, because 42616321 - 2¹⁷ = 42485249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42616361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175980 + ... + 176221.

Almost surely, 2^42616321 is an apocalyptic number.

It is an amenable number.

42616321 is a deficient number, since it is larger than the sum of its proper divisors (4226545).

42616321 is a wasteful number, since it uses less digits than its factorization.

42616321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352223 (or 352212 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 42616321 is about 6528.1177225905. The cubic root of 42616321 is about 349.2946912036.

Adding to 42616321 its reverse (12361624), we get a palindrome (54977945).

The spelling of 42616321 in words is "forty-two million, six hundred sixteen thousand, three hundred twenty-one".