12171007 has 4 divisors (see below), whose sum is σ = 12193416. Its totient is φ = 12148600.

The previous prime is 12170999. The next prime is 12171011. The reversal of 12171007 is 70017121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70017121 = 3881 ⋅18041.

It is a cyclic number.

It is not a de Polignac number, because 12171007 - 2³ = 12170999 is a prime.

It is a super-2 number, since 2×12171007² = 296266822788098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171067) 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, 10369 + ... + 11482.

It is an arithmetic number, because the mean of its divisors is an integer number (3048354).

Almost surely, 2^12171007 is an apocalyptic number.

12171007 is a deficient number, since it is larger than the sum of its proper divisors (22409).

12171007 is an equidigital number, since it uses as much as digits as its factorization.

12171007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22408.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 12171007 is about 3488.6970347108. The cubic root of 12171007 is about 230.0252461260.

Adding to 12171007 its reverse (70017121), we get a palindrome (82188128).

The spelling of 12171007 in words is "twelve million, one hundred seventy-one thousand, seven".