12172256 has 12 divisors (see below), whose sum is σ = 23964192. Its totient is φ = 6086112.

The previous prime is 12172253. The next prime is 12172271. The reversal of 12172256 is 65227121.

It is a super-2 number, since 2×12172256² = 296327632259072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190160 + ... + 190223.

It is an arithmetic number, because the mean of its divisors is an integer number (1997016).

Almost surely, 2^12172256 is an apocalyptic number.

12172256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12172256 is a deficient number, since it is larger than the sum of its proper divisors (11791936).

12172256 is an equidigital number, since it uses as much as digits as its factorization.

12172256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380393 (or 380385 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 12172256 is about 3488.8760367775. The cubic root of 12172256 is about 230.0331143248.

Adding to 12172256 its reverse (65227121), we get a palindrome (77399377).

The spelling of 12172256 in words is "twelve million, one hundred seventy-two thousand, two hundred fifty-six".