1304431535421 has 12 divisors (see below), whose sum is σ = 2153347296672. Its totient is φ = 745389448776.

The previous prime is 1304431535299. The next prime is 1304431535443. The reversal of 1304431535421 is 1245351344031.

1304431535421 is a `hidden beast` number, since 1 + 30 + 4 + 4 + 31 + 53 + 542 + 1 = 666.

It is not a de Polignac number, because 1304431535421 - 2²⁶ = 1304364426557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304431535521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10352631171 + ... + 10352631296.

It is an arithmetic number, because the mean of its divisors is an integer number (179445608056).

Almost surely, 2^{1304431535421} is an apocalyptic number.

It is an amenable number.

1304431535421 is a deficient number, since it is larger than the sum of its proper divisors (848915761251).

1304431535421 is a wasteful number, since it uses less digits than its factorization.

1304431535421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20705262480 (or 20705262477 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 1304431535421 its reverse (1245351344031), we get a palindrome (2549782879452).

The spelling of 1304431535421 in words is "one trillion, three hundred four billion, four hundred thirty-one million, five hundred thirty-five thousand, four hundred twenty-one".