12172013 has 8 divisors (see below), whose sum is σ = 14207232. Its totient is φ = 10210896.

The previous prime is 12172003. The next prime is 12172019. The reversal of 12172013 is 31027121.

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

It is a cyclic number.

It is not a de Polignac number, because 12172013 - 2⁴ = 12171997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12171982 and 12172000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172019) 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, 18170 + ... + 18827.

It is an arithmetic number, because the mean of its divisors is an integer number (1775904).

Almost surely, 2^12172013 is an apocalyptic number.

It is an amenable number.

12172013 is a deficient number, since it is larger than the sum of its proper divisors (2035219).

12172013 is an equidigital number, since it uses as much as digits as its factorization.

12172013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37051.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12172013 is about 3488.8412116346. The cubic root of 12172013 is about 230.0315835645.

Adding to 12172013 its reverse (31027121), we get a palindrome (43199134).

The spelling of 12172013 in words is "twelve million, one hundred seventy-two thousand, thirteen".