42206569 has 2 divisors, whose sum is σ = 42206570. Its totient is φ = 42206568.

The previous prime is 42206561. The next prime is 42206599. The reversal of 42206569 is 96560224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27667600 + 14538969 = 5260^2 + 3813^2 .

It is a cyclic number.

It is not a de Polignac number, because 42206569 - 2³ = 42206561 is a prime.

It is a super-2 number, since 2×42206569² = 3562788933503522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42206561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21103284 + 21103285.

It is an arithmetic number, because the mean of its divisors is an integer number (21103285).

Almost surely, 2^42206569 is an apocalyptic number.

It is an amenable number.

42206569 is a deficient number, since it is larger than the sum of its proper divisors (1).

42206569 is an equidigital number, since it uses as much as digits as its factorization.

42206569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 42206569 is about 6496.6582948467. The cubic root of 42206569 is about 348.1716052617.

The spelling of 42206569 in words is "forty-two million, two hundred six thousand, five hundred sixty-nine".