12170513 has 4 divisors (see below), whose sum is σ = 12188160. Its totient is φ = 12152868.

The previous prime is 12170497. The next prime is 12170531. The reversal of 12170513 is 31507121.

12170513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31507121 = 59 ⋅534019.

It is a cyclic number.

It is not a de Polignac number, because 12170513 - 2⁴ = 12170497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12170533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7745 + ... + 9182.

It is an arithmetic number, because the mean of its divisors is an integer number (3047040).

Almost surely, 2^12170513 is an apocalyptic number.

It is an amenable number.

12170513 is a deficient number, since it is larger than the sum of its proper divisors (17647).

12170513 is an equidigital number, since it uses as much as digits as its factorization.

12170513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17646.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 12170513 is about 3488.6262339207. The cubic root of 12170513 is about 230.0221339757.

Adding to 12170513 its reverse (31507121), we get a palindrome (43677634).

The spelling of 12170513 in words is "twelve million, one hundred seventy thousand, five hundred thirteen".