42011321 has 6 divisors (see below), whose sum is σ = 46177866. Its totient is φ = 38192000.

The previous prime is 42011311. The next prime is 42011323. The reversal of 42011321 is 12311024.

It can be written as a sum of positive squares in only one way, i.e., 35940025 + 6071296 = 5995^2 + 2464^2 .

It is not a de Polignac number, because 42011321 - 2¹⁸ = 41749177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42011296 and 42011305.

It is not an unprimeable number, because it can be changed into a prime (42011323) 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, 173480 + ... + 173721.

It is an arithmetic number, because the mean of its divisors is an integer number (7696311).

Almost surely, 2^42011321 is an apocalyptic number.

It is an amenable number.

42011321 is a deficient number, since it is larger than the sum of its proper divisors (4166545).

42011321 is a wasteful number, since it uses less digits than its factorization.

42011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347223 (or 347212 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 42011321 is about 6481.6140736702. The cubic root of 42011321 is about 347.6338935064.

Adding to 42011321 its reverse (12311024), we get a palindrome (54322345).

The spelling of 42011321 in words is "forty-two million, eleven thousand, three hundred twenty-one".