12167261 has 4 divisors (see below), whose sum is σ = 12184092. Its totient is φ = 12150432.

The previous prime is 12167227. The next prime is 12167293. The reversal of 12167261 is 16276121.

12167261 is digitally balanced in base 3, 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: 16276121 = 2459 ⋅6619.

It can be written as a sum of positive squares in 2 ways, for example, as 4708900 + 7458361 = 2170^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 12167261 - 2²² = 7972957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12167261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280 + ... + 8793.

It is an arithmetic number, because the mean of its divisors is an integer number (3046023).

Almost surely, 2^12167261 is an apocalyptic number.

12167261 is the 1865-th centered heptagonal number.

It is an amenable number.

12167261 is a deficient number, since it is larger than the sum of its proper divisors (16831).

12167261 is an equidigital number, since it uses as much as digits as its factorization.

12167261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16830.

The product of its digits is 1008, while the sum is 26.

The square root of 12167261 is about 3488.1601167378. The cubic root of 12167261 is about 230.0016446007.

The spelling of 12167261 in words is "twelve million, one hundred sixty-seven thousand, two hundred sixty-one".