12581261 has 8 divisors (see below), whose sum is σ = 15685824. Its totient is φ = 9803520.

The previous prime is 12581243. The next prime is 12581263. The reversal of 12581261 is 16218521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12581261 - 2¹⁰ = 12580237 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12581261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581263) 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 7 ways as a sum of consecutive naturals, for example, 81620 + ... + 81773.

It is an arithmetic number, because the mean of its divisors is an integer number (1960728).

Almost surely, 2^12581261 is an apocalyptic number.

12581261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12581261 is a deficient number, since it is larger than the sum of its proper divisors (3104563).

12581261 is a wasteful number, since it uses less digits than its factorization.

12581261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163411.

The product of its digits is 960, while the sum is 26.

The square root of 12581261 is about 3547.0073301306. The cubic root of 12581261 is about 232.5812626874.

Adding to 12581261 its reverse (16218521), we get a palindrome (28799782).

The spelling of 12581261 in words is "twelve million, five hundred eighty-one thousand, two hundred sixty-one".