123240423 has 8 divisors (see below), whose sum is σ = 167421168. Its totient is φ = 80609984.

The previous prime is 123240421. The next prime is 123240431. The reversal of 123240423 is 324042321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123240423 - 2¹ = 123240421 is a prime.

It is a super-2 number, since 2×123240423² = 30376403722437858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123240423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387390 + ... + 387707.

It is an arithmetic number, because the mean of its divisors is an integer number (20927646).

Almost surely, 2^123240423 is an apocalyptic number.

123240423 is a deficient number, since it is larger than the sum of its proper divisors (44180745).

123240423 is an equidigital number, since it uses as much as digits as its factorization.

123240423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775153.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123240423 is about 11101.3703208208. The cubic root of 123240423 is about 497.6428020321.

Adding to 123240423 its reverse (324042321), we get a palindrome (447282744).

The spelling of 123240423 in words is "one hundred twenty-three million, two hundred forty thousand, four hundred twenty-three".