1428645 has 32 divisors (see below), whose sum is σ = 2467584. Its totient is φ = 704000.

The previous prime is 1428631. The next prime is 1428649. The reversal of 1428645 is 5468241.

It is not a de Polignac number, because 1428645 - 2⁵ = 1428613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428649) 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 31 ways as a sum of consecutive naturals, for example, 14095 + ... + 14195.

It is an arithmetic number, because the mean of its divisors is an integer number (77112).

2^1428645 is an apocalyptic number.

1428645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428645 is a deficient number, since it is larger than the sum of its proper divisors (1038939).

1428645 is a wasteful number, since it uses less digits than its factorization.

1428645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173.

The product of its digits is 7680, while the sum is 30.

The square root of 1428645 is about 1195.2593860748. The cubic root of 1428645 is about 112.6267214034.

The spelling of 1428645 in words is "one million, four hundred twenty-eight thousand, six hundred forty-five".