842449 has 2 divisors, whose sum is σ = 842450. Its totient is φ = 842448.

The previous prime is 842447. The next prime is 842473. The reversal of 842449 is 944248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 294849 = 740^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 842449 - 2¹ = 842447 is a prime.

Together with 842447, 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 842449.

It is not a weakly prime, because it can be changed into another prime (842447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421224 + 421225.

It is an arithmetic number, because the mean of its divisors is an integer number (421225).

2⁸⁴²⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

842449 is a deficient number, since it is larger than the sum of its proper divisors (1).

842449 is an equidigital number, since it uses as much as digits as its factorization.

842449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 842449 is about 917.8502056436. The cubic root of 842449 is about 94.4454861349.

The spelling of 842449 in words is "eight hundred forty-two thousand, four hundred forty-nine".