12172073 has 4 divisors (see below), whose sum is σ = 12207300. Its totient is φ = 12136848.

The previous prime is 12172049. The next prime is 12172079. The reversal of 12172073 is 37027121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9168784 + 3003289 = 3028^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 12172073 - 2¹² = 12167977 is a prime.

It is a super-2 number, since 2×12172073² = 296318722234658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172079) 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, 17090 + ... + 17787.

It is an arithmetic number, because the mean of its divisors is an integer number (3051825).

Almost surely, 2^12172073 is an apocalyptic number.

It is an amenable number.

12172073 is a deficient number, since it is larger than the sum of its proper divisors (35227).

12172073 is an equidigital number, since it uses as much as digits as its factorization.

12172073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35226.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 12172073 is about 3488.8498104676. The cubic root of 12172073 is about 230.0319615319.

Adding to 12172073 its reverse (37027121), we get a palindrome (49199194).

The spelling of 12172073 in words is "twelve million, one hundred seventy-two thousand, seventy-three".