1283839 has 2 divisors, whose sum is σ = 1283840. Its totient is φ = 1283838.

The previous prime is 1283831. The next prime is 1283873. The reversal of 1283839 is 9383821.

It is an a-pointer prime, because the next prime (1283873) can be obtained adding 1283839 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1283839 - 2³ = 1283831 is a prime.

It is equal to p₉₈₈₈₁ and since 1283839 and 98881 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641919 + 641920.

It is an arithmetic number, because the mean of its divisors is an integer number (641920).

2^1283839 is an apocalyptic number.

1283839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283839 is an equidigital number, since it uses as much as digits as its factorization.

1283839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 1283839 is about 1133.0661940063. The cubic root of 1283839 is about 108.6851447536.

The spelling of 1283839 in words is "one million, two hundred eighty-three thousand, eight hundred thirty-nine".