1304140243 has 6 divisors (see below), whose sum is σ = 1517061156. Its totient is φ = 1117834452.

The previous prime is 1304140223. The next prime is 1304140291. The reversal of 1304140243 is 3420414031.

It is not a de Polignac number, because 1304140243 - 2²¹ = 1302043091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304140223) 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 in 5 ways as a sum of consecutive naturals, for example, 13307505 + ... + 13307602.

It is an arithmetic number, because the mean of its divisors is an integer number (252843526).

Almost surely, 2^1304140243 is an apocalyptic number.

1304140243 is a deficient number, since it is larger than the sum of its proper divisors (212920913).

1304140243 is an equidigital number, since it uses as much as digits as its factorization.

1304140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26615121 (or 26615114 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1304140243 is about 36112.8819536741. The cubic root of 1304140243 is about 1092.5502787613.

Adding to 1304140243 its reverse (3420414031), we get a palindrome (4724554274).

The spelling of 1304140243 in words is "one billion, three hundred four million, one hundred forty thousand, two hundred forty-three".