42248321 has 2 divisors, whose sum is σ = 42248322. Its totient is φ = 42248320.

The previous prime is 42248303. The next prime is 42248329. The reversal of 42248321 is 12384224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 16289296 = 5095^2 + 4036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42248321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42248329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21124160 + 21124161.

It is an arithmetic number, because the mean of its divisors is an integer number (21124161).

Almost surely, 2^42248321 is an apocalyptic number.

It is an amenable number.

42248321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42248321 is an equidigital number, since it uses as much as digits as its factorization.

42248321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 42248321 is about 6499.8708448707. The cubic root of 42248321 is about 348.2863746796.

The spelling of 42248321 in words is "forty-two million, two hundred forty-eight thousand, three hundred twenty-one".