12232561 has 16 divisors (see below), whose sum is σ = 14204160. Its totient is φ = 10417680.

The previous prime is 12232547. The next prime is 12232579. The reversal of 12232561 is 16523221.

12232561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12232561 - 2⁷ = 12232433 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12232531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22090 + ... + 22636.

It is an arithmetic number, because the mean of its divisors is an integer number (887760).

Almost surely, 2^12232561 is an apocalyptic number.

12232561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12232561 is a deficient number, since it is larger than the sum of its proper divisors (1971599).

12232561 is a wasteful number, since it uses less digits than its factorization.

12232561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its digits is 720, while the sum is 22.

The square root of 12232561 is about 3497.5078270105. The cubic root of 12232561 is about 230.4123729953.

Adding to 12232561 its reverse (16523221), we get a palindrome (28755782).

The spelling of 12232561 in words is "twelve million, two hundred thirty-two thousand, five hundred sixty-one".