12205660 has 24 divisors (see below), whose sum is σ = 27140400. Its totient is φ = 4594944.

The previous prime is 12205649. The next prime is 12205691. The reversal of 12205660 is 6650221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17610 + ... + 18289.

It is an arithmetic number, because the mean of its divisors is an integer number (1130850).

Almost surely, 2^12205660 is an apocalyptic number.

12205660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205660 is an abundant number, since it is smaller than the sum of its proper divisors (14934740).

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

12205660 is a wasteful number, since it uses less digits than its factorization.

12205660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35925 (or 35923 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12205660 is about 3493.6599720064. The cubic root of 12205660 is about 230.2433467261.

Adding to 12205660 its reverse (6650221), we get a palindrome (18855881).

The spelling of 12205660 in words is "twelve million, two hundred five thousand, six hundred sixty".