12009860 has 24 divisors (see below), whose sum is σ = 25292736. Its totient is φ = 4790240.

The previous prime is 12009859. The next prime is 12009869. The reversal of 12009860 is 6890021.

It is not an unprimeable number, because it can be changed into a prime (12009869) 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, 9209 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (1053864).

Almost surely, 2^12009860 is an apocalyptic number.

12009860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12009860 is an abundant number, since it is smaller than the sum of its proper divisors (13282876).

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

12009860 is a wasteful number, since it uses less digits than its factorization.

12009860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12009860 is about 3465.5244913288. The cubic root of 12009860 is about 229.0055362467.

Adding to 12009860 its reverse (6890021), we get a palindrome (18899881).

The spelling of 12009860 in words is "twelve million, nine thousand, eight hundred sixty".