42611321 has 2 divisors, whose sum is σ = 42611322. Its totient is φ = 42611320.

The previous prime is 42611251. The next prime is 42611347. The reversal of 42611321 is 12311624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41538025 + 1073296 = 6445^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 42611321 - 2¹⁰ = 42610297 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42611293 and 42611302.

It is not a weakly prime, because it can be changed into another prime (42611381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21305660 + 21305661.

It is an arithmetic number, because the mean of its divisors is an integer number (21305661).

Almost surely, 2^42611321 is an apocalyptic number.

It is an amenable number.

42611321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42611321 is an equidigital number, since it uses as much as digits as its factorization.

42611321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 42611321 is about 6527.7347525769. The cubic root of 42611321 is about 349.2810302265.

Adding to 42611321 its reverse (12311624), we get a palindrome (54922945).

The spelling of 42611321 in words is "forty-two million, six hundred eleven thousand, three hundred twenty-one".