12516261 has 4 divisors (see below), whose sum is σ = 16688352. Its totient is φ = 8344172.

The previous prime is 12516253. The next prime is 12516263. The reversal of 12516261 is 16261521.

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 a cyclic number.

It is not a de Polignac number, because 12516261 - 2³ = 12516253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516263) 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, 2086041 + ... + 2086046.

It is an arithmetic number, because the mean of its divisors is an integer number (4172088).

Almost surely, 2^12516261 is an apocalyptic number.

It is an amenable number.

12516261 is a deficient number, since it is larger than the sum of its proper divisors (4172091).

12516261 is an equidigital number, since it uses as much as digits as its factorization.

12516261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172090.

The product of its digits is 720, while the sum is 24.

The square root of 12516261 is about 3537.8328111995. The cubic root of 12516261 is about 232.1800339085.

Adding to 12516261 its reverse (16261521), we get a palindrome (28777782).

The spelling of 12516261 in words is "twelve million, five hundred sixteen thousand, two hundred sixty-one".