1243412133 has 8 divisors (see below), whose sum is σ = 1661822496. Its totient is φ = 826971600.

The previous prime is 1243412099. The next prime is 1243412143. The reversal of 1243412133 is 3312143421.

It is a happy number.

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

It is not a de Polignac number, because 1243412133 - 2⁹ = 1243411621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243412143) 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, 490983 + ... + 493508.

It is an arithmetic number, because the mean of its divisors is an integer number (207727812).

Almost surely, 2^1243412133 is an apocalyptic number.

It is an amenable number.

1243412133 is a deficient number, since it is larger than the sum of its proper divisors (418410363).

1243412133 is an equidigital number, since it uses as much as digits as its factorization.

1243412133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984915.

The product of its digits is 1728, while the sum is 24.

The square root of 1243412133 is about 35262.0494724853. The cubic root of 1243412133 is about 1075.3215934897.

Adding to 1243412133 its reverse (3312143421), we get a palindrome (4555555554).

The spelling of 1243412133 in words is "one billion, two hundred forty-three million, four hundred twelve thousand, one hundred thirty-three".