123240430 has 16 divisors (see below), whose sum is σ = 229482720. Its totient is φ = 47596192.

The previous prime is 123240421. The next prime is 123240431. The reversal of 123240430 is 34042321.

It is a junction number, because it is equal to n+sod(n) for n = 123240398 and 123240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240431) 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, 212194 + ... + 212773.

It is an arithmetic number, because the mean of its divisors is an integer number (14342670).

Almost surely, 2^123240430 is an apocalyptic number.

123240430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123240430 is a deficient number, since it is larger than the sum of its proper divisors (106242290).

123240430 is a wasteful number, since it uses less digits than its factorization.

123240430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425003.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123240430 is about 11101.3706360971. The cubic root of 123240430 is about 497.6428114541.

Adding to 123240430 its reverse (34042321), we get a palindrome (157282751).

The spelling of 123240430 in words is "one hundred twenty-three million, two hundred forty thousand, four hundred thirty".