123432123 has 16 divisors (see below), whose sum is σ = 167736096. Its totient is φ = 80720640.

The previous prime is 123432103. The next prime is 123432131. The reversal of 123432123 is 321234321.

123432123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 123432123 - 2¹⁴ = 123415739 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 123432123.

It is not an unprimeable number, because it can be changed into a prime (123432103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41713 + ... + 44573.

It is an arithmetic number, because the mean of its divisors is an integer number (10483506).

Almost surely, 2^123432123 is an apocalyptic number.

123432123 is a deficient number, since it is larger than the sum of its proper divisors (44303973).

123432123 is a wasteful number, since it uses less digits than its factorization.

123432123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134.

The product of its digits is 864, while the sum is 21.

The square root of 123432123 is about 11110.0010351035. The cubic root of 123432123 is about 497.9006955104.

Adding to 123432123 its reverse (321234321), we get a palindrome (444666444).

The spelling of 123432123 in words is "one hundred twenty-three million, four hundred thirty-two thousand, one hundred twenty-three".