12272618 has 4 divisors (see below), whose sum is σ = 18408930. Its totient is φ = 6136308.

The previous prime is 12272609. The next prime is 12272633. The reversal of 12272618 is 81627221.

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

It can be written as a sum of positive squares in only one way, i.e., 11002489 + 1270129 = 3317^2 + 1127^2 .

It is a super-3 number, since 3×12272618³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3068153 + ... + 3068156.

Almost surely, 2^12272618 is an apocalyptic number.

12272618 is a deficient number, since it is larger than the sum of its proper divisors (6136312).

12272618 is an equidigital number, since it uses as much as digits as its factorization.

12272618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136311.

The product of its digits is 2688, while the sum is 29.

The square root of 12272618 is about 3503.2296527633. The cubic root of 12272618 is about 230.6636033577.

Adding to 12272618 its reverse (81627221), we get a palindrome (93899839).

The spelling of 12272618 in words is "twelve million, two hundred seventy-two thousand, six hundred eighteen".