1303421243 has 4 divisors (see below), whose sum is σ = 1303533888. Its totient is φ = 1303308600.

The previous prime is 1303421239. The next prime is 1303421321. The reversal of 1303421243 is 3421243031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1303421243 - 2² = 1303421239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1303421233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36683 + ... + 62868.

It is an arithmetic number, because the mean of its divisors is an integer number (325883472).

Almost surely, 2^1303421243 is an apocalyptic number.

1303421243 is a deficient number, since it is larger than the sum of its proper divisors (112645).

1303421243 is an equidigital number, since it uses as much as digits as its factorization.

1303421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112644.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1303421243 is about 36102.9256847696. The cubic root of 1303421243 is about 1092.3494598537.

Adding to 1303421243 its reverse (3421243031), we get a palindrome (4724664274).

The spelling of 1303421243 in words is "one billion, three hundred three million, four hundred twenty-one thousand, two hundred forty-three".