1428887 has 2 divisors, whose sum is σ = 1428888. Its totient is φ = 1428886.

The previous prime is 1428863. The next prime is 1428893. The reversal of 1428887 is 7888241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428887 - 2⁸ = 1428631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1428887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428587) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714443 + 714444.

It is an arithmetic number, because the mean of its divisors is an integer number (714444).

2^1428887 is an apocalyptic number.

1428887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428887 is an equidigital number, since it uses as much as digits as its factorization.

1428887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28672, while the sum is 38.

The square root of 1428887 is about 1195.3606150447. The cubic root of 1428887 is about 112.6330803724.

The spelling of 1428887 in words is "one million, four hundred twenty-eight thousand, eight hundred eighty-seven".