42321017 has 2 divisors, whose sum is σ = 42321018. Its totient is φ = 42321016.

The previous prime is 42320969. The next prime is 42321023. The reversal of 42321017 is 71012324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 17480761 = 4984^2 + 4181^2 .

It is a cyclic number.

It is not a de Polignac number, because 42321017 - 2¹⁰ = 42319993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42321017.

It is not a weakly prime, because it can be changed into another prime (42321067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160508 + 21160509.

It is an arithmetic number, because the mean of its divisors is an integer number (21160509).

Almost surely, 2^42321017 is an apocalyptic number.

It is an amenable number.

42321017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42321017 is an equidigital number, since it uses as much as digits as its factorization.

42321017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 42321017 is about 6505.4605524897. The cubic root of 42321017 is about 348.4860237824.

The spelling of 42321017 in words is "forty-two million, three hundred twenty-one thousand, seventeen".