12920123 has 4 divisors (see below), whose sum is σ = 12934080. Its totient is φ = 12906168.

The previous prime is 12920093. The next prime is 12920177. The reversal of 12920123 is 32102921.

12920123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32102921 = 3049 ⋅10529.

It is a cyclic number.

It is not a de Polignac number, because 12920123 - 2¹⁴ = 12903739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12920095 and 12920104.

It is not an unprimeable number, because it can be changed into a prime (12920183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5483 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (3233520).

Almost surely, 2^12920123 is an apocalyptic number.

12920123 is a deficient number, since it is larger than the sum of its proper divisors (13957).

12920123 is an equidigital number, since it uses as much as digits as its factorization.

12920123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12920123 is about 3594.4572608392. The cubic root of 12920123 is about 234.6508955572.

The spelling of 12920123 in words is "twelve million, nine hundred twenty thousand, one hundred twenty-three".