12099860 has 24 divisors (see below), whose sum is σ = 25511976. Its totient is φ = 4820480.

The previous prime is 12099859. The next prime is 12099883. The reversal of 12099860 is 6899021.

It can be written as a sum of positive squares in 4 ways, for example, as 293764 + 11806096 = 542^2 + 3436^2 .

It is a super-2 number, since 2×12099860² = 292813224039200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12099860.

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, 4544 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (1062999).

Almost surely, 2^12099860 is an apocalyptic number.

12099860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12099860 is an abundant number, since it is smaller than the sum of its proper divisors (13412116).

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

12099860 is a wasteful number, since it uses less digits than its factorization.

12099860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2441 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 12099860 is about 3478.4853025419. The cubic root of 12099860 is about 229.5761570420.

The spelling of 12099860 in words is "twelve million, ninety-nine thousand, eight hundred sixty".