1003121 has 8 divisors (see below), whose sum is σ = 1171200. Its totient is φ = 841248.

The previous prime is 1003111. The next prime is 1003133. The reversal of 1003121 is 1213001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1003121 - 2¹⁴ = 986737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003099 and 1003108.

It is not an unprimeable number, because it can be changed into a prime (1003111) 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, 1196 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (146400).

2^1003121 is an apocalyptic number.

It is an amenable number.

1003121 is a deficient number, since it is larger than the sum of its proper divisors (168079).

1003121 is an equidigital number, since it uses as much as digits as its factorization.

1003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103.

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

The square root of 1003121 is about 1001.5592843162. The cubic root of 1003121 is about 100.1039252913.

Adding to 1003121 its reverse (1213001), we get a palindrome (2216122).

The spelling of 1003121 in words is "one million, three thousand, one hundred twenty-one".