12144015 has 24 divisors (see below), whose sum is σ = 22669920. Its totient is φ = 5978304.

The previous prime is 12144007. The next prime is 12144019. The reversal of 12144015 is 51044121.

It is not a de Polignac number, because 12144015 - 2³ = 12144007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9795 + ... + 10964.

It is an arithmetic number, because the mean of its divisors is an integer number (944580).

Almost surely, 2^12144015 is an apocalyptic number.

12144015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12144015 is a deficient number, since it is larger than the sum of its proper divisors (10525905).

12144015 is a wasteful number, since it uses less digits than its factorization.

12144015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20783 (or 20780 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 12144015 is about 3484.8263945281. The cubic root of 12144015 is about 229.8550756833.

Adding to 12144015 its reverse (51044121), we get a palindrome (63188136).

The spelling of 12144015 in words is "twelve million, one hundred forty-four thousand, fifteen".