1003123 has 4 divisors (see below), whose sum is σ = 1094328. Its totient is φ = 911920.

The previous prime is 1003111. The next prime is 1003133. The reversal of 1003123 is 3213001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3213001 = 11 ⋅292091.

It is a cyclic number.

It is not a de Polignac number, because 1003123 - 2⁵ = 1003091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003103) 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, 45586 + ... + 45607.

It is an arithmetic number, because the mean of its divisors is an integer number (273582).

2^1003123 is an apocalyptic number.

1003123 is a deficient number, since it is larger than the sum of its proper divisors (91205).

1003123 is an equidigital number, since it uses as much as digits as its factorization.

1003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91204.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1003123 is about 1001.5602827589. The cubic root of 1003123 is about 100.1039918195.

Adding to 1003123 its reverse (3213001), we get a palindrome (4216124).

It can be divided in two parts, 100 and 3123, that added together give a palindrome (3223).

The spelling of 1003123 in words is "one million, three thousand, one hundred twenty-three".