1428375 has 32 divisors (see below), whose sum is σ = 2568384. Its totient is φ = 700800.

The previous prime is 1428359. The next prime is 1428389. The reversal of 1428375 is 5738241.

It is not a de Polignac number, because 1428375 - 2⁴ = 1428359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4729 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (80262).

2^1428375 is an apocalyptic number.

1428375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1428375 is a deficient number, since it is larger than the sum of its proper divisors (1140009).

1428375 is a wasteful number, since it uses less digits than its factorization.

1428375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 314 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 1428375 is about 1195.1464345426. The cubic root of 1428375 is about 112.6196258383.

It can be divided in two parts, 14283 and 75, that multiplied together give a square (1071225 = 1035²).

The spelling of 1428375 in words is "one million, four hundred twenty-eight thousand, three hundred seventy-five".