12123453 has 4 divisors (see below), whose sum is σ = 16164608. Its totient is φ = 8082300.

The previous prime is 12123439. The next prime is 12123467. The reversal of 12123453 is 35432121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12123439) and next prime (12123467).

It is not a de Polignac number, because 12123453 - 2⁹ = 12122941 is a prime.

It is a super-2 number, since 2×12123453² = 293956225286418, which contains 22 as substring.

It is a Duffinian number.

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, 2020573 + ... + 2020578.

It is an arithmetic number, because the mean of its divisors is an integer number (4041152).

Almost surely, 2^12123453 is an apocalyptic number.

It is an amenable number.

12123453 is a deficient number, since it is larger than the sum of its proper divisors (4041155).

12123453 is an equidigital number, since it uses as much as digits as its factorization.

12123453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041154.

The product of its digits is 720, while the sum is 21.

The square root of 12123453 is about 3481.8749259558. The cubic root of 12123453 is about 229.7252737449.

Adding to 12123453 its reverse (35432121), we get a palindrome (47555574).

The spelling of 12123453 in words is "twelve million, one hundred twenty-three thousand, four hundred fifty-three".