1243421330 has 8 divisors (see below), whose sum is σ = 2238158412. Its totient is φ = 497368528.

The previous prime is 1243421321. The next prime is 1243421341. The reversal of 1243421330 is 331243421.

It can be written as a sum of positive squares in 2 ways, for example, as 1204020601 + 39400729 = 34699^2 + 6277^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1243421296 and 1243421305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62171057 + ... + 62171076.

Almost surely, 2^1243421330 is an apocalyptic number.

1243421330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243421330 is a deficient number, since it is larger than the sum of its proper divisors (994737082).

1243421330 is a wasteful number, since it uses less digits than its factorization.

1243421330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124342140.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1243421330 is about 35262.1798815672. The cubic root of 1243421330 is about 1075.3242447180.

Adding to 1243421330 its reverse (331243421), we get a palindrome (1574664751).

The spelling of 1243421330 in words is "one billion, two hundred forty-three million, four hundred twenty-one thousand, three hundred thirty".