42207169 has 2 divisors, whose sum is σ = 42207170. Its totient is φ = 42207168.

The previous prime is 42207167. The next prime is 42207199. The reversal of 42207169 is 96170224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 8334769 = 5820^2 + 2887^2 .

It is a cyclic number.

It is not a de Polignac number, because 42207169 - 2¹ = 42207167 is a prime.

It is a super-2 number, since 2×42207169² = 3562890229989122, which contains 22 as substring.

Together with 42207167, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42207169.

It is not a weakly prime, because it can be changed into another prime (42207167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21103584 + 21103585.

It is an arithmetic number, because the mean of its divisors is an integer number (21103585).

Almost surely, 2^42207169 is an apocalyptic number.

It is an amenable number.

42207169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42207169 is an equidigital number, since it uses as much as digits as its factorization.

42207169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 42207169 is about 6496.7044722690. The cubic root of 42207169 is about 348.1732550995.

The spelling of 42207169 in words is "forty-two million, two hundred seven thousand, one hundred sixty-nine".