1428069 has 4 divisors (see below), whose sum is σ = 1904096. Its totient is φ = 952044.

The previous prime is 1428041. The next prime is 1428079. The reversal of 1428069 is 9608241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1428069 - 2¹³ = 1419877 is a prime.

It is a super-2 number, since 2×1428069² = 4078762137522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428029) 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 in 3 ways as a sum of consecutive naturals, for example, 238009 + ... + 238014.

It is an arithmetic number, because the mean of its divisors is an integer number (476024).

2^1428069 is an apocalyptic number.

It is an amenable number.

1428069 is a deficient number, since it is larger than the sum of its proper divisors (476027).

1428069 is an equidigital number, since it uses as much as digits as its factorization.

1428069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476026.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1428069 is about 1195.0184099000. The cubic root of 1428069 is about 112.6115831169.

The spelling of 1428069 in words is "one million, four hundred twenty-eight thousand, sixty-nine".