12123858 has 16 divisors (see below), whose sum is σ = 24423840. Its totient is φ = 4011936.

The previous prime is 12123857. The next prime is 12123877. The reversal of 12123858 is 85832121.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12123857) 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, 6435 + ... + 8102.

It is an arithmetic number, because the mean of its divisors is an integer number (1526490).

Almost surely, 2^12123858 is an apocalyptic number.

12123858 is an abundant number, since it is smaller than the sum of its proper divisors (12299982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123858 is a wasteful number, since it uses less digits than its factorization.

12123858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14681.

The product of its digits is 3840, while the sum is 30.

The square root of 12123858 is about 3481.9330837912. The cubic root of 12123858 is about 229.7278318088.

Adding to 12123858 its reverse (85832121), we get a palindrome (97955979).

The spelling of 12123858 in words is "twelve million, one hundred twenty-three thousand, eight hundred fifty-eight".