1428003 has 8 divisors (see below), whose sum is σ = 2115600. Its totient is φ = 951984.

The previous prime is 1427999. The next prime is 1428013. The reversal of 1428003 is 3008241.

It is a happy number.

It is not a de Polignac number, because 1428003 - 2² = 1427999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26418 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (264450).

2^1428003 is an apocalyptic number.

1428003 is a deficient number, since it is larger than the sum of its proper divisors (687597).

1428003 is an equidigital number, since it uses as much as digits as its factorization.

1428003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52898 (or 52892 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1428003 is about 1194.9907949436. The cubic root of 1428003 is about 112.6098482616.

The spelling of 1428003 in words is "one million, four hundred twenty-eight thousand, three".