1428169 has 2 divisors, whose sum is σ = 1428170. Its totient is φ = 1428168.

The previous prime is 1428157. The next prime is 1428179. The reversal of 1428169 is 9618241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1428025 + 144 = 1195^2 + 12^2 .

It is an emirp because it is prime and its reverse (9618241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428169 - 2⁵ = 1428137 is a prime.

It is a super-2 number, since 2×1428169² = 4079333385122, which contains 22 as substring.

1428169 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428169.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428109) 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, 714084 + 714085.

It is an arithmetic number, because the mean of its divisors is an integer number (714085).

2^1428169 is an apocalyptic number.

It is an amenable number.

1428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428169 is an equidigital number, since it uses as much as digits as its factorization.

1428169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 1428169 is about 1195.0602495272. The cubic root of 1428169 is about 112.6142115836.

The spelling of 1428169 in words is "one million, four hundred twenty-eight thousand, one hundred sixty-nine".