12015000 has 160 divisors (see below), whose sum is σ = 42174000. Its totient is φ = 3168000.

The previous prime is 12014999. The next prime is 12015001. The reversal of 12015000 is 51021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12014999) and next prime (12015001).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015001) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 134956 + ... + 135044.

Almost surely, 2^12015000 is an apocalyptic number.

12015000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12015000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21087000).

12015000 is an abundant number, since it is smaller than the sum of its proper divisors (30159000).

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

12015000 is an equidigital number, since it uses as much as digits as its factorization.

12015000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 12015000 is about 3466.2660024874. The cubic root of 12015000 is about 229.0382016448.

Adding to 12015000 its reverse (51021), we get a palindrome (12066021).

The spelling of 12015000 in words is "twelve million, fifteen thousand".