1304421143 has 4 divisors (see below), whose sum is σ = 1304871240. Its totient is φ = 1303971048.

The previous prime is 1304421137. The next prime is 1304421179. The reversal of 1304421143 is 3411244031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3411244031 = 13 ⋅262403387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304421143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304421343) 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, 220673 + ... + 226506.

It is an arithmetic number, because the mean of its divisors is an integer number (326217810).

Almost surely, 2^1304421143 is an apocalyptic number.

1304421143 is a deficient number, since it is larger than the sum of its proper divisors (450097).

1304421143 is an equidigital number, since it uses as much as digits as its factorization.

1304421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450096.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1304421143 is about 36116.7709381667. The cubic root of 1304421143 is about 1092.6287149426.

Adding to 1304421143 its reverse (3411244031), we get a palindrome (4715665174).

The spelling of 1304421143 in words is "one billion, three hundred four million, four hundred twenty-one thousand, one hundred forty-three".