1303303421 has 6 divisors (see below), whose sum is σ = 1516087710. Its totient is φ = 1117117176.

The previous prime is 1303303399. The next prime is 1303303459. The reversal of 1303303421 is 1243033031.

It can be written as a sum of positive squares in only one way, i.e., 770340025 + 532963396 = 27755^2 + 23086^2 .

It is not a de Polignac number, because 1303303421 - 2¹⁸ = 1303041277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303303393 and 1303303402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303303481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13298966 + ... + 13299063.

It is an arithmetic number, because the mean of its divisors is an integer number (252681285).

Almost surely, 2^1303303421 is an apocalyptic number.

It is an amenable number.

1303303421 is a deficient number, since it is larger than the sum of its proper divisors (212784289).

1303303421 is an equidigital number, since it uses as much as digits as its factorization.

1303303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26598043 (or 26598036 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1303303421 is about 36101.2938964797. The cubic root of 1303303421 is about 1092.3165447653.

Adding to 1303303421 its reverse (1243033031), we get a palindrome (2546336452).

The spelling of 1303303421 in words is "one billion, three hundred three million, three hundred three thousand, four hundred twenty-one".