1243431120 has 40 divisors (see below), whose sum is σ = 3854637216. Its totient is φ = 331581568.

The previous prime is 1243431113. The next prime is 1243431131. The reversal of 1243431120 is 211343421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1243431120² = 3092241900368908800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2590242 + ... + 2590721.

Almost surely, 2^1243431120 is an apocalyptic number.

1243431120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243431120 is an abundant number, since it is smaller than the sum of its proper divisors (2611206096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243431120 is a wasteful number, since it uses less digits than its factorization.

1243431120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180979 (or 5180973 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1243431120 is about 35262.3186985768. The cubic root of 1243431120 is about 1075.3270668766.

Adding to 1243431120 its reverse (211343421), we get a palindrome (1454774541).

The spelling of 1243431120 in words is "one billion, two hundred forty-three million, four hundred thirty-one thousand, one hundred twenty".