422549 has 2 divisors, whose sum is σ = 422550. Its totient is φ = 422548.

The previous prime is 422537. The next prime is 422551. The reversal of 422549 is 945224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 49 = 650^2 + 7^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422549 is a prime.

It is a Sophie Germain prime.

Together with 422551, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211274 + 211275.

It is an arithmetic number, because the mean of its divisors is an integer number (211275).

2⁴²²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

422549 is a deficient number, since it is larger than the sum of its proper divisors (1).

422549 is an equidigital number, since it uses as much as digits as its factorization.

422549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 422549 is about 650.0376912149. The cubic root of 422549 is about 75.0399194894.

It can be divided in two parts, 4225 and 49, that multiplied together give a square (207025 = 455²).

The spelling of 422549 in words is "four hundred twenty-two thousand, five hundred forty-nine".