12123413 has 4 divisors (see below), whose sum is σ = 12419148. Its totient is φ = 11827680.

The previous prime is 12123373. The next prime is 12123439. The reversal of 12123413 is 31432121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 11957764 = 407^2 + 3458^2 .

It is not a de Polignac number, because 12123413 - 2¹⁰ = 12122389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12123391 and 12123400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123493) 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, 147806 + ... + 147887.

It is an arithmetic number, because the mean of its divisors is an integer number (3104787).

Almost surely, 2^12123413 is an apocalyptic number.

It is an amenable number.

12123413 is a deficient number, since it is larger than the sum of its proper divisors (295735).

12123413 is an equidigital number, since it uses as much as digits as its factorization.

12123413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295734.

The product of its digits is 144, while the sum is 17.

The square root of 12123413 is about 3481.8691819194. The cubic root of 12123413 is about 229.7250210936.

Adding to 12123413 its reverse (31432121), we get a palindrome (43555534).

The spelling of 12123413 in words is "twelve million, one hundred twenty-three thousand, four hundred thirteen".