1243421433 has 6 divisors (see below), whose sum is σ = 1796053194. Its totient is φ = 828947616.

The previous prime is 1243421383. The next prime is 1243421449. The reversal of 1243421433 is 3341243421.

1243421433 is a `hidden beast` number, since 12 + 434 + 214 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1184254569 + 59166864 = 34413^2 + 7692^2 .

It is not a de Polignac number, because 1243421433 - 2⁸ = 1243421177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243421397 and 1243421406.

It is not an unprimeable number, because it can be changed into a prime (1243421033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69078960 + ... + 69078977.

It is an arithmetic number, because the mean of its divisors is an integer number (299342199).

Almost surely, 2^1243421433 is an apocalyptic number.

It is an amenable number.

1243421433 is a deficient number, since it is larger than the sum of its proper divisors (552631761).

1243421433 is a wasteful number, since it uses less digits than its factorization.

1243421433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138157943 (or 138157940 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 1243421433 is about 35262.1813420554. The cubic root of 1243421433 is about 1075.3242744098.

Adding to 1243421433 its reverse (3341243421), we get a palindrome (4584664854).

The spelling of 1243421433 in words is "one billion, two hundred forty-three million, four hundred twenty-one thousand, four hundred thirty-three".