1232645643 has 6 divisors (see below), whose sum is σ = 1780488164. Its totient is φ = 821763756.

The previous prime is 1232645633. The next prime is 1232645663. The reversal of 1232645643 is 3465462321.

1232645643 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 6 + 4 + 5 + 643 = 666.

It is not a de Polignac number, because 1232645643 - 2⁹ = 1232645131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232645598 and 1232645607.

It is not an unprimeable number, because it can be changed into a prime (1232645633) 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, 68480305 + ... + 68480322.

Almost surely, 2^1232645643 is an apocalyptic number.

1232645643 is a deficient number, since it is larger than the sum of its proper divisors (547842521).

1232645643 is a wasteful number, since it uses less digits than its factorization.

1232645643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136960633 (or 136960630 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 1232645643 is about 35109.0535759653. The cubic root of 1232645643 is about 1072.2089176968.

The spelling of 1232645643 in words is "one billion, two hundred thirty-two million, six hundred forty-five thousand, six hundred forty-three".