1003420321 has 2 divisors, whose sum is σ = 1003420322. Its totient is φ = 1003420320.

The previous prime is 1003420309. The next prime is 1003420331. The reversal of 1003420321 is 1230243001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621804096 + 381616225 = 24936^2 + 19535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003420321 - 2⁷ = 1003420193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1003420295 and 1003420304.

It is not a weakly prime, because it can be changed into another prime (1003420331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501710160 + 501710161.

It is an arithmetic number, because the mean of its divisors is an integer number (501710161).

Almost surely, 2^1003420321 is an apocalyptic number.

It is an amenable number.

1003420321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003420321 is an equidigital number, since it uses as much as digits as its factorization.

1003420321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1003420321 is about 31676.8104612822. The cubic root of 1003420321 is about 1001.1388096203.

Adding to 1003420321 its reverse (1230243001), we get a palindrome (2233663322).

The spelling of 1003420321 in words is "one billion, three million, four hundred twenty thousand, three hundred twenty-one".