1428057 has 16 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 943776.

The previous prime is 1428041. The next prime is 1428079. The reversal of 1428057 is 7508241.

It is not a de Polignac number, because 1428057 - 2⁴ = 1428041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428057.

It is not an unprimeable number, because it can be changed into a prime (1428157) 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 15 ways as a sum of consecutive naturals, for example, 6013 + ... + 6245.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2^1428057 is an apocalyptic number.

It is an amenable number.

1428057 is a deficient number, since it is larger than the sum of its proper divisors (706023).

1428057 is a wasteful number, since it uses less digits than its factorization.

1428057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1428057 is about 1195.0133890463. The cubic root of 1428057 is about 112.6112676926.

The spelling of 1428057 in words is "one million, four hundred twenty-eight thousand, fifty-seven".