1021103 has 4 divisors (see below), whose sum is σ = 1023960. Its totient is φ = 1018248.

The previous prime is 1021093. The next prime is 1021123. The reversal of 1021103 is 3011201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3011201 = 1283 ⋅2347.

It is a cyclic number.

It is not a de Polignac number, because 1021103 - 2⁴ = 1021087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021123) 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 3 ways as a sum of consecutive naturals, for example, 800 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (255990).

2^1021103 is an apocalyptic number.

1021103 is a deficient number, since it is larger than the sum of its proper divisors (2857).

1021103 is an equidigital number, since it uses as much as digits as its factorization.

1021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1021103 is about 1010.4964126606. The cubic root of 1021103 is about 100.6985423570.

Adding to 1021103 its reverse (3011201), we get a palindrome (4032304).

The spelling of 1021103 in words is "one million, twenty-one thousand, one hundred three".