1428709 has 2 divisors, whose sum is σ = 1428710. Its totient is φ = 1428708.

The previous prime is 1428703. The next prime is 1428751. The reversal of 1428709 is 9078241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 624100 = 897^2 + 790^2 .

It is an emirp because it is prime and its reverse (9078241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428709 - 2⁵ = 1428677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714354 + 714355.

It is an arithmetic number, because the mean of its divisors is an integer number (714355).

2^1428709 is an apocalyptic number.

It is an amenable number.

1428709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428709 is an equidigital number, since it uses as much as digits as its factorization.

1428709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1428709 is about 1195.2861582065. The cubic root of 1428709 is about 112.6284031840.

The spelling of 1428709 in words is "one million, four hundred twenty-eight thousand, seven hundred nine".