1021203 has 6 divisors (see below), whose sum is σ = 1475084. Its totient is φ = 680796.

The previous prime is 1021199. The next prime is 1021217. The reversal of 1021203 is 3021201.

It is a happy number.

It is not a de Polignac number, because 1021203 - 2² = 1021199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 113467 = 1021203 / (1 + 0 + 2 + 1 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021243) 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 5 ways as a sum of consecutive naturals, for example, 56725 + ... + 56742.

2^1021203 is an apocalyptic number.

1021203 is a deficient number, since it is larger than the sum of its proper divisors (453881).

1021203 is a wasteful number, since it uses less digits than its factorization.

1021203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113473 (or 113470 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1021203 is about 1010.5458920801. The cubic root of 1021203 is about 100.7018294970.

Adding to 1021203 its reverse (3021201), we get a palindrome (4042404).

The spelling of 1021203 in words is "one million, twenty-one thousand, two hundred three".