12561141 has 4 divisors (see below), whose sum is σ = 16748192. Its totient is φ = 8374092.

The previous prime is 12561139. The next prime is 12561163. The reversal of 12561141 is 14116521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12561141 - 2¹ = 12561139 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093521 + ... + 2093526.

It is an arithmetic number, because the mean of its divisors is an integer number (4187048).

Almost surely, 2^12561141 is an apocalyptic number.

It is an amenable number.

12561141 is a deficient number, since it is larger than the sum of its proper divisors (4187051).

12561141 is an equidigital number, since it uses as much as digits as its factorization.

12561141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187050.

The product of its digits is 240, while the sum is 21.

The square root of 12561141 is about 3544.1700015660. The cubic root of 12561141 is about 232.4572149274.

Adding to 12561141 its reverse (14116521), we get a palindrome (26677662).

The spelling of 12561141 in words is "twelve million, five hundred sixty-one thousand, one hundred forty-one".