12272158 has 4 divisors (see below), whose sum is σ = 18408240. Its totient is φ = 6136078.

The previous prime is 12272129. The next prime is 12272159. The reversal of 12272158 is 85127221.

12272158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85127221 = 4787 ⋅17783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3068038 + ... + 3068041.

It is an arithmetic number, because the mean of its divisors is an integer number (4602060).

Almost surely, 2^12272158 is an apocalyptic number.

12272158 is a deficient number, since it is larger than the sum of its proper divisors (6136082).

12272158 is an equidigital number, since it uses as much as digits as its factorization.

12272158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136081.

The product of its digits is 2240, while the sum is 28.

The square root of 12272158 is about 3503.1639984448. The cubic root of 12272158 is about 230.6607214249.

Adding to 12272158 its reverse (85127221), we get a palindrome (97399379).

The spelling of 12272158 in words is "twelve million, two hundred seventy-two thousand, one hundred fifty-eight".