422849561 has 2 divisors, whose sum is σ = 422849562. Its totient is φ = 422849560.

The previous prime is 422849533. The next prime is 422849569. The reversal of 422849561 is 165948224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222457225 + 200392336 = 14915^2 + 14156^2 .

It is a cyclic number.

It is not a de Polignac number, because 422849561 - 2²² = 418655257 is a prime.

It is a Chen prime.

It is equal to p_22487954 and since 422849561 and 22487954 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (422849569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211424780 + 211424781.

It is an arithmetic number, because the mean of its divisors is an integer number (211424781).

Almost surely, 2^422849561 is an apocalyptic number.

It is an amenable number.

422849561 is a deficient number, since it is larger than the sum of its proper divisors (1).

422849561 is an equidigital number, since it uses as much as digits as its factorization.

422849561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 422849561 is about 20563.3061787252. The cubic root of 422849561 is about 750.5770734973.

The spelling of 422849561 in words is "four hundred twenty-two million, eight hundred forty-nine thousand, five hundred sixty-one".