12171073 has 4 divisors (see below), whose sum is σ = 12430080. Its totient is φ = 11912068.

The previous prime is 12171067. The next prime is 12171101. The reversal of 12171073 is 37017121.

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: 37017121 = 1213 ⋅30517.

It is a cyclic number.

It is not a de Polignac number, because 12171073 - 2⁵ = 12171041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12171023) 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, 129433 + ... + 129526.

It is an arithmetic number, because the mean of its divisors is an integer number (3107520).

Almost surely, 2^12171073 is an apocalyptic number.

It is an amenable number.

12171073 is a deficient number, since it is larger than the sum of its proper divisors (259007).

12171073 is an equidigital number, since it uses as much as digits as its factorization.

12171073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259006.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 12171073 is about 3488.7064938169. The cubic root of 12171073 is about 230.0256619130.

Adding to 12171073 its reverse (37017121), we get a palindrome (49188194).

The spelling of 12171073 in words is "twelve million, one hundred seventy-one thousand, seventy-three".