42053321 has 2 divisors, whose sum is σ = 42053322. Its totient is φ = 42053320.

The previous prime is 42053317. The next prime is 42053351. The reversal of 42053321 is 12335024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36240400 + 5812921 = 6020^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 42053321 - 2² = 42053317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42053293 and 42053302.

It is not a weakly prime, because it can be changed into another prime (42053311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21026660 + 21026661.

It is an arithmetic number, because the mean of its divisors is an integer number (21026661).

Almost surely, 2^42053321 is an apocalyptic number.

It is an amenable number.

42053321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42053321 is an equidigital number, since it uses as much as digits as its factorization.

42053321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42053321 is about 6484.8531980300. The cubic root of 42053321 is about 347.7497016610.

Adding to 42053321 its reverse (12335024), we get a palindrome (54388345).

The spelling of 42053321 in words is "forty-two million, fifty-three thousand, three hundred twenty-one".