12123897 has 4 divisors (see below), whose sum is σ = 16165200. Its totient is φ = 8082596.

The previous prime is 12123887. The next prime is 12123899. The reversal of 12123897 is 79832121.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12123899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020647 + ... + 2020652.

It is an arithmetic number, because the mean of its divisors is an integer number (4041300).

Almost surely, 2^12123897 is an apocalyptic number.

It is an amenable number.

12123897 is a deficient number, since it is larger than the sum of its proper divisors (4041303).

12123897 is an equidigital number, since it uses as much as digits as its factorization.

12123897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041302.

The product of its digits is 6048, while the sum is 33.

The square root of 12123897 is about 3481.9386841241. The cubic root of 12123897 is about 229.7280781378.

The spelling of 12123897 in words is "twelve million, one hundred twenty-three thousand, eight hundred ninety-seven".