12651261 has 24 divisors (see below), whose sum is σ = 19863360. Its totient is φ = 7140672.

The previous prime is 12651257. The next prime is 12651293. The reversal of 12651261 is 16215621.

12651261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12651261 - 2² = 12651257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12600 + ... + 13566.

It is an arithmetic number, because the mean of its divisors is an integer number (827640).

Almost surely, 2^12651261 is an apocalyptic number.

It is an amenable number.

12651261 is a deficient number, since it is larger than the sum of its proper divisors (7212099).

12651261 is an equidigital number, since it uses as much as digits as its factorization.

12651261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 1066 counting only the distinct ones).

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

The square root of 12651261 is about 3556.8611162091. The cubic root of 12651261 is about 233.0118127212.

Adding to 12651261 its reverse (16215621), we get a palindrome (28866882).

The spelling of 12651261 in words is "twelve million, six hundred fifty-one thousand, two hundred sixty-one".