12172245 has 32 divisors (see below), whose sum is σ = 20248704. Its totient is φ = 6240000.

The previous prime is 12172219. The next prime is 12172253. The reversal of 12172245 is 54227121.

It is not a de Polignac number, because 12172245 - 2⁷ = 12172117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48370 + ... + 48620.

It is an arithmetic number, because the mean of its divisors is an integer number (632772).

Almost surely, 2^12172245 is an apocalyptic number.

12172245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12172245 is a deficient number, since it is larger than the sum of its proper divisors (8076459).

12172245 is a wasteful number, since it uses less digits than its factorization.

12172245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its digits is 1120, while the sum is 24.

The square root of 12172245 is about 3488.8744603382. The cubic root of 12172245 is about 230.0330450315.

Adding to 12172245 its reverse (54227121), we get a palindrome (66399366).

The spelling of 12172245 in words is "twelve million, one hundred seventy-two thousand, two hundred forty-five".