1243431441 has 24 divisors (see below), whose sum is σ = 2054355264. Its totient is φ = 709941600.

The previous prime is 1243431439. The next prime is 1243431443. The reversal of 1243431441 is 1441343421.

It is an interprime number because it is at equal distance from previous prime (1243431439) and next prime (1243431443).

It is not a de Polignac number, because 1243431441 - 2¹ = 1243431439 is a prime.

It is a super-2 number, since 2×1243431441² = 3092243496934672962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243431443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74791 + ... + 89891.

It is an arithmetic number, because the mean of its divisors is an integer number (85598136).

Almost surely, 2^1243431441 is an apocalyptic number.

It is an amenable number.

1243431441 is a deficient number, since it is larger than the sum of its proper divisors (810923823).

1243431441 is a wasteful number, since it uses less digits than its factorization.

1243431441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16421 (or 16418 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1243431441 is about 35262.3232501774. The cubic root of 1243431441 is about 1075.3271594109.

Adding to 1243431441 its reverse (1441343421), we get a palindrome (2684774862).

The spelling of 1243431441 in words is "one billion, two hundred forty-three million, four hundred thirty-one thousand, four hundred forty-one".