1243420323 has 8 divisors (see below), whose sum is σ = 1711374336. Its totient is φ = 802206600.

The previous prime is 1243420289. The next prime is 1243420331. The reversal of 1243420323 is 3230243421.

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

It is not a de Polignac number, because 1243420323 - 2⁶ = 1243420259 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1243420293 and 1243420302.

It is not an unprimeable number, because it can be changed into a prime (1243424323) 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, 6684963 + ... + 6685148.

It is an arithmetic number, because the mean of its divisors is an integer number (213921792).

Almost surely, 2^1243420323 is an apocalyptic number.

1243420323 is a deficient number, since it is larger than the sum of its proper divisors (467954013).

1243420323 is a wasteful number, since it uses less digits than its factorization.

1243420323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13370145.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243420323 is about 35262.1656028100. The cubic root of 1243420323 is about 1075.3239544297.

Adding to 1243420323 its reverse (3230243421), we get a palindrome (4473663744).

The spelling of 1243420323 in words is "one billion, two hundred forty-three million, four hundred twenty thousand, three hundred twenty-three".