12420123 has 8 divisors (see below), whose sum is σ = 17007888. Its totient is φ = 8056224.

The previous prime is 12420097. The next prime is 12420131. The reversal of 12420123 is 32102421.

12420123 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12420123 - 2⁶ = 12420059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12420823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55836 + ... + 56057.

It is an arithmetic number, because the mean of its divisors is an integer number (2125986).

Almost surely, 2^12420123 is an apocalyptic number.

12420123 is a deficient number, since it is larger than the sum of its proper divisors (4587765).

12420123 is a wasteful number, since it uses less digits than its factorization.

12420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111933.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12420123 is about 3524.2194880569. The cubic root of 12420123 is about 231.5840433642.

Adding to 12420123 its reverse (32102421), we get a palindrome (44522544).

The spelling of 12420123 in words is "twelve million, four hundred twenty thousand, one hundred twenty-three".