1243133413 has 4 divisors (see below), whose sum is σ = 1258111008. Its totient is φ = 1228155820.

The previous prime is 1243133329. The next prime is 1243133443. The reversal of 1243133413 is 3143313421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243133413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243133443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7488673 + ... + 7488838.

It is an arithmetic number, because the mean of its divisors is an integer number (314527752).

Almost surely, 2^1243133413 is an apocalyptic number.

It is an amenable number.

1243133413 is a deficient number, since it is larger than the sum of its proper divisors (14977595).

1243133413 is an equidigital number, since it uses as much as digits as its factorization.

1243133413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14977594.

The product of its digits is 2592, while the sum is 25.

The square root of 1243133413 is about 35258.0971267594. The cubic root of 1243133413 is about 1075.2412403969.

Adding to 1243133413 its reverse (3143313421), we get a palindrome (4386446834).

The spelling of 1243133413 in words is "one billion, two hundred forty-three million, one hundred thirty-three thousand, four hundred thirteen".