1428769 has 2 divisors, whose sum is σ = 1428770. Its totient is φ = 1428768.

The previous prime is 1428767. The next prime is 1428787. The reversal of 1428769 is 9678241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 245025 = 1088^2 + 495^2 .

It is an emirp because it is prime and its reverse (9678241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428769 - 2¹ = 1428767 is a prime.

It is a super-2 number, since 2×1428769² = 4082761710722, which contains 22 as substring.

Together with 1428767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1428767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714384 + 714385.

It is an arithmetic number, because the mean of its divisors is an integer number (714385).

2^1428769 is an apocalyptic number.

It is an amenable number.

1428769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428769 is an equidigital number, since it uses as much as digits as its factorization.

1428769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 1428769 is about 1195.3112565353. The cubic root of 1428769 is about 112.6299798078.

It can be divided in two parts, 1428 and 769, that added together give a cube (2197 = 13³).

The spelling of 1428769 in words is "one million, four hundred twenty-eight thousand, seven hundred sixty-nine".