1428269 has 4 divisors (see below), whose sum is σ = 1431900. Its totient is φ = 1424640.

The previous prime is 1428257. The next prime is 1428281. The reversal of 1428269 is 9628241.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1428257) and next prime (1428281).

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 990025 = 662^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428269 - 2⁴ = 1428253 is a prime.

It is a super-2 number, since 2×1428269² = 4079904672722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 2039.

It is an arithmetic number, because the mean of its divisors is an integer number (357975).

2^1428269 is an apocalyptic number.

It is an amenable number.

1428269 is a deficient number, since it is larger than the sum of its proper divisors (3631).

1428269 is an equidigital number, since it uses as much as digits as its factorization.

1428269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its digits is 6912, while the sum is 32.

The square root of 1428269 is about 1195.1020876896. The cubic root of 1428269 is about 112.6168399276.

The spelling of 1428269 in words is "one million, four hundred twenty-eight thousand, two hundred sixty-nine".