123241643 has 4 divisors (see below), whose sum is σ = 140847600. Its totient is φ = 105635688.

The previous prime is 123241631. The next prime is 123241669. The reversal of 123241643 is 346142321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123241643 - 2⁶ = 123241579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123241603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8802968 + ... + 8802981.

It is an arithmetic number, because the mean of its divisors is an integer number (35211900).

Almost surely, 2^123241643 is an apocalyptic number.

123241643 is a deficient number, since it is larger than the sum of its proper divisors (17605957).

123241643 is an equidigital number, since it uses as much as digits as its factorization.

123241643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17605956.

The product of its digits is 3456, while the sum is 26.

The square root of 123241643 is about 11101.4252688562. The cubic root of 123241643 is about 497.6444441400.

Adding to 123241643 its reverse (346142321), we get a palindrome (469383964).

It can be divided in two parts, 1232 and 41643, that added together give a cube (42875 = 35³).

The spelling of 123241643 in words is "one hundred twenty-three million, two hundred forty-one thousand, six hundred forty-three".