1304016421 has 4 divisors (see below), whose sum is σ = 1309613292.
Its totient is φ = 1298419552.
The previous prime is 1304016347. The next prime is 1304016479. The reversal of 1304016421 is 1246104031.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1246104031 = 71 ⋅17550761.
It can be written as a sum of positive squares in 2 ways, for example, as 261630625 + 1042385796 = 16175^2 + 32286^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1304016421 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1304016392 and 1304016401.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1304016221) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798086 + ... + 2798551.
It is an arithmetic number, because the mean of its divisors is an integer number (327403323).
Almost surely, 21304016421 is an apocalyptic number.
It is an amenable number.
1304016421 is a deficient number, since it is larger than the sum of its proper divisors (5596871).
1304016421 is an equidigital number, since it uses as much as digits as its factorization.
1304016421 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5596870.
The product of its (nonzero) digits is 576, while the sum is 22.
The square root of 1304016421 is about 36111.1675385884.
The cubic root of 1304016421 is about 1092.5157001586.
The spelling of 1304016421 in words is "one billion, three hundred four million, sixteen thousand, four hundred twenty-one".