12071217 has 8 divisors (see below), whose sum is σ = 16254720. Its totient is φ = 7967600.

The previous prime is 12071209. The next prime is 12071219. The reversal of 12071217 is 71217021.

It is a happy number.

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 12071217 - 2³ = 12071209 is a prime.

It is a super-2 number, since 2×12071217² = 291428559722178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12071193 and 12071202.

It is not an unprimeable number, because it can be changed into a prime (12071219) 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, 19617 + ... + 20222.

It is an arithmetic number, because the mean of its divisors is an integer number (2031840).

Almost surely, 2^12071217 is an apocalyptic number.

It is an amenable number.

12071217 is a deficient number, since it is larger than the sum of its proper divisors (4183503).

12071217 is a wasteful number, since it uses less digits than its factorization.

12071217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39943.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 12071217 is about 3474.3656975051. The cubic root of 12071217 is about 229.3948616815.

Adding to 12071217 its reverse (71217021), we get a palindrome (83288238).

The spelling of 12071217 in words is "twelve million, seventy-one thousand, two hundred seventeen".