1304012421 has 24 divisors (see below), whose sum is σ = 2043024984. Its totient is φ = 798243840.

The previous prime is 1304012407. The next prime is 1304012461. The reversal of 1304012421 is 1242104031.

It can be written as a sum of positive squares in 4 ways, for example, as 61449921 + 1242562500 = 7839^2 + 35250^2 .

It is not a de Polignac number, because 1304012421 - 2¹⁴ = 1303996037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1304012394 and 1304012403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304012461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97666 + ... + 110211.

It is an arithmetic number, because the mean of its divisors is an integer number (85126041).

Almost surely, 2^1304012421 is an apocalyptic number.

It is an amenable number.

1304012421 is a deficient number, since it is larger than the sum of its proper divisors (739012563).

1304012421 is a wasteful number, since it uses less digits than its factorization.

1304012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207941 (or 207938 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1304012421 is about 36111.1121540171. The cubic root of 1304012421 is about 1092.5145830798.

Adding to 1304012421 its reverse (1242104031), we get a palindrome (2546116452).

The spelling of 1304012421 in words is "one billion, three hundred four million, twelve thousand, four hundred twenty-one".