1304234021 has 8 divisors (see below), whose sum is σ = 1373661504. Its totient is φ = 1235866720.

The previous prime is 1304233991. The next prime is 1304234047. The reversal of 1304234021 is 1204324031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304234021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1304233984 and 1304234002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304234521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262520 + ... + 267441.

It is an arithmetic number, because the mean of its divisors is an integer number (171707688).

Almost surely, 2^1304234021 is an apocalyptic number.

It is an amenable number.

1304234021 is a deficient number, since it is larger than the sum of its proper divisors (69427483).

1304234021 is a wasteful number, since it uses less digits than its factorization.

1304234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530091.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1304234021 is about 36114.1803312771. The cubic root of 1304234021 is about 1092.5764658029.

Adding to 1304234021 its reverse (1204324031), we get a palindrome (2508558052).

The spelling of 1304234021 in words is "one billion, three hundred four million, two hundred thirty-four thousand, twenty-one".