12051515 has 16 divisors (see below), whose sum is σ = 16693248. Its totient is φ = 8181216.

The previous prime is 12051509. The next prime is 12051541. The reversal of 12051515 is 51515021.

It is a happy number.

12051515 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12051515 - 2⁶ = 12051451 is a prime.

It is a Duffinian number.

12051515 is a modest number, since divided by 1515 gives 1205 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1934 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (1043328).

Almost surely, 2^12051515 is an apocalyptic number.

12051515 is a deficient number, since it is larger than the sum of its proper divisors (4641733).

12051515 is a wasteful number, since it uses less digits than its factorization.

12051515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 12051515 is about 3471.5292019512. The cubic root of 12051515 is about 229.2699916802.

Adding to 12051515 its reverse (51515021), we get a palindrome (63566536).

The spelling of 12051515 in words is "twelve million, fifty-one thousand, five hundred fifteen".