12276561 has 16 divisors (see below), whose sum is σ = 18025920. Its totient is φ = 7369920.

The previous prime is 12276559. The next prime is 12276569. The reversal of 12276561 is 16567221.

12276561 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 12276561 - 2¹ = 12276559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12276569) 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 15 ways as a sum of consecutive naturals, for example, 1891 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (1126620).

Almost surely, 2^12276561 is an apocalyptic number.

12276561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12276561 is a deficient number, since it is larger than the sum of its proper divisors (5749359).

12276561 is a wasteful number, since it uses less digits than its factorization.

12276561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536.

The product of its digits is 5040, while the sum is 30.

The square root of 12276561 is about 3503.7923739857. The cubic root of 12276561 is about 230.6883035807.

The spelling of 12276561 in words is "twelve million, two hundred seventy-six thousand, five hundred sixty-one".