1428857 has 8 divisors (see below), whose sum is σ = 1516800. Its totient is φ = 1342224.

The previous prime is 1428853. The next prime is 1428863. The reversal of 1428857 is 7588241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1428857 - 2² = 1428853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2744 + ... + 3222.

It is an arithmetic number, because the mean of its divisors is an integer number (189600).

2^1428857 is an apocalyptic number.

It is an amenable number.

1428857 is a deficient number, since it is larger than the sum of its proper divisors (87943).

1428857 is a wasteful number, since it uses less digits than its factorization.

With its successor (1428858) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (655).

1428857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655.

The product of its digits is 17920, while the sum is 35.

The square root of 1428857 is about 1195.3480664643. The cubic root of 1428857 is about 112.6322921094.

The spelling of 1428857 in words is "one million, four hundred twenty-eight thousand, eight hundred fifty-seven".