12123660 has 24 divisors (see below), whose sum is σ = 33946416. Its totient is φ = 3232960.

The previous prime is 12123649. The next prime is 12123673. The reversal of 12123660 is 6632121.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100971 + ... + 101090.

It is an arithmetic number, because the mean of its divisors is an integer number (1414434).

Almost surely, 2^12123660 is an apocalyptic number.

12123660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123660 is an abundant number, since it is smaller than the sum of its proper divisors (21822756).

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

12123660 is a wasteful number, since it uses less digits than its factorization.

12123660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202073 (or 202071 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12123660 is about 3481.9046511931. The cubic root of 12123660 is about 229.7265812069.

Adding to 12123660 its reverse (6632121), we get a palindrome (18755781).

The spelling of 12123660 in words is "twelve million, one hundred twenty-three thousand, six hundred sixty".