12016513 has 4 divisors (see below), whose sum is σ = 12151620. Its totient is φ = 11881408.

The previous prime is 12016507. The next prime is 12016541. The reversal of 12016513 is 31561021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31561021 = 41 ⋅769781.

It can be written as a sum of positive squares in 2 ways, for example, as 5726449 + 6290064 = 2393^2 + 2508^2 .

It is a cyclic number.

It is not a de Polignac number, because 12016513 - 2⁵ = 12016481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12016013) 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 3 ways as a sum of consecutive naturals, for example, 67420 + ... + 67597.

It is an arithmetic number, because the mean of its divisors is an integer number (3037905).

Almost surely, 2^12016513 is an apocalyptic number.

It is an amenable number.

12016513 is a deficient number, since it is larger than the sum of its proper divisors (135107).

12016513 is an equidigital number, since it uses as much as digits as its factorization.

12016513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135106.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12016513 is about 3466.4842419951. The cubic root of 12016513 is about 229.0478151905.

Adding to 12016513 its reverse (31561021), we get a palindrome (43577534).

The spelling of 12016513 in words is "twelve million, sixteen thousand, five hundred thirteen".