12015215 has 8 divisors (see below), whose sum is σ = 14494128. Its totient is φ = 9561600.

The previous prime is 12015203. The next prime is 12015217. The reversal of 12015215 is 51251021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12015215 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12015193 and 12015202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5261 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (1811766).

Almost surely, 2^12015215 is an apocalyptic number.

12015215 is a deficient number, since it is larger than the sum of its proper divisors (2478913).

12015215 is a wasteful number, since it uses less digits than its factorization.

12015215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12649.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12015215 is about 3466.2970155484. The cubic root of 12015215 is about 229.0395677960.

Adding to 12015215 its reverse (51251021), we get a palindrome (63266236).

The spelling of 12015215 in words is "twelve million, fifteen thousand, two hundred fifteen".