12013515 has 20 divisors (see below), whose sum is σ = 21536064. Its totient is φ = 6406992.

The previous prime is 12013501. The next prime is 12013517. The reversal of 12013515 is 51531021.

It is not a de Polignac number, because 12013515 - 2⁴ = 12013499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12013517) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14427 + ... + 15236.

Almost surely, 2^12013515 is an apocalyptic number.

12013515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12013515 is a deficient number, since it is larger than the sum of its proper divisors (9522549).

12013515 is an equidigital number, since it uses as much as digits as its factorization.

12013515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29680 (or 29671 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12013515 is about 3466.0517884186. The cubic root of 12013515 is about 229.0287652252.

Adding to 12013515 its reverse (51531021), we get a palindrome (63544536).

The spelling of 12013515 in words is "twelve million, thirteen thousand, five hundred fifteen".