12003915 has 64 divisors (see below), whose sum is σ = 25251840. Its totient is φ = 4717440.

The previous prime is 12003911. The next prime is 12003961. The reversal of 12003915 is 51930021.

It is not a de Polignac number, because 12003915 - 2² = 12003911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12003891 and 12003900.

It is not an unprimeable number, because it can be changed into a prime (12003911) 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 63 ways as a sum of consecutive naturals, for example, 21672 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (394560).

Almost surely, 2^12003915 is an apocalyptic number.

12003915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12003915 is an abundant number, since it is smaller than the sum of its proper divisors (13247925).

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

12003915 is a wasteful number, since it uses less digits than its factorization.

12003915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 12003915 is about 3464.6666506318. Note that the first 4 decimals coincide. The cubic root of 12003915 is about 228.9677433383.

Adding to 12003915 its reverse (51930021), we get a palindrome (63933936).

It can be divided in two parts, 1200 and 3915, that added together give a palindrome (5115).

The spelling of 12003915 in words is "twelve million, three thousand, nine hundred fifteen".