1428839 has 2 divisors, whose sum is σ = 1428840. Its totient is φ = 1428838.

The previous prime is 1428811. The next prime is 1428851. The reversal of 1428839 is 9388241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428839 - 2¹² = 1424743 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1428799 and 1428808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714419 + 714420.

It is an arithmetic number, because the mean of its divisors is an integer number (714420).

2^1428839 is an apocalyptic number.

1428839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428839 is an equidigital number, since it uses as much as digits as its factorization.

1428839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 1428839 is about 1195.3405372529. The cubic root of 1428839 is about 112.6318191463.

The spelling of 1428839 in words is "one million, four hundred twenty-eight thousand, eight hundred thirty-nine".