1232640243 has 12 divisors (see below), whose sum is σ = 1797767920. Its totient is φ = 813781296.

The previous prime is 1232640223. The next prime is 1232640247. The reversal of 1232640243 is 3420462321.

1232640243 is a `hidden beast` number, since 12 + 3 + 2 + 640 + 2 + 4 + 3 = 666.

1232640243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1232640243 - 2⁶ = 1232640179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232640247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663928 + ... + 665781.

Almost surely, 2^1232640243 is an apocalyptic number.

1232640243 is a deficient number, since it is larger than the sum of its proper divisors (565127677).

1232640243 is a wasteful number, since it uses less digits than its factorization.

1232640243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329818 (or 1329815 counting only the distinct ones).

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

The square root of 1232640243 is about 35108.9766726403. The cubic root of 1232640243 is about 1072.2073519760.

The spelling of 1232640243 in words is "one billion, two hundred thirty-two million, six hundred forty thousand, two hundred forty-three".