12099870 has 24 divisors (see below), whose sum is σ = 31459896. Its totient is φ = 3226608.

The previous prime is 12099859. The next prime is 12099883. The reversal of 12099870 is 7899021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67132 + ... + 67311.

It is an arithmetic number, because the mean of its divisors is an integer number (1310829).

Almost surely, 2^12099870 is an apocalyptic number.

12099870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12099870 is an abundant number, since it is smaller than the sum of its proper divisors (19360026).

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

12099870 is a wasteful number, since it uses less digits than its factorization.

12099870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134456 (or 134453 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 12099870 is about 3478.4867399489. The cubic root of 12099870 is about 229.5762202869.

The spelling of 12099870 in words is "twelve million, ninety-nine thousand, eight hundred seventy".