12272661 has 8 divisors (see below), whose sum is σ = 18181760. Its totient is φ = 8181756.

The previous prime is 12272633. The next prime is 12272671. The reversal of 12272661 is 16627221.

12272661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12272661 - 2²¹ = 10175509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 454543 = 12272661 / (1 + 2 + 2 + 7 + 2 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227245 + ... + 227298.

It is an arithmetic number, because the mean of its divisors is an integer number (2272720).

Almost surely, 2^12272661 is an apocalyptic number.

It is an amenable number.

12272661 is a deficient number, since it is larger than the sum of its proper divisors (5909099).

12272661 is an equidigital number, since it uses as much as digits as its factorization.

12272661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454552 (or 454546 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12272661 is about 3503.2357899519. The cubic root of 12272661 is about 230.6638727521.

Adding to 12272661 its reverse (16627221), we get a palindrome (28899882).

The spelling of 12272661 in words is "twelve million, two hundred seventy-two thousand, six hundred sixty-one".