1243230321 has 8 divisors (see below), whose sum is σ = 1659082720. Its totient is φ = 828099072.

The previous prime is 1243230299. The next prime is 1243230337. The reversal of 1243230321 is 1230323421.

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

It is not a de Polignac number, because 1243230321 - 2¹⁹ = 1242706033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243230361) 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, 176251 + ... + 183168.

It is an arithmetic number, because the mean of its divisors is an integer number (207385340).

Almost surely, 2^1243230321 is an apocalyptic number.

It is an amenable number.

1243230321 is a deficient number, since it is larger than the sum of its proper divisors (415852399).

1243230321 is a wasteful number, since it uses less digits than its factorization.

1243230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360575.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1243230321 is about 35259.4713658614. The cubic root of 1243230321 is about 1075.2691796804.

Adding to 1243230321 its reverse (1230323421), we get a palindrome (2473553742).

The spelling of 1243230321 in words is "one billion, two hundred forty-three million, two hundred thirty thousand, three hundred twenty-one".