12587261 has 4 divisors (see below), whose sum is σ = 12880032. Its totient is φ = 12294492.

The previous prime is 12587257. The next prime is 12587269. The reversal of 12587261 is 16278521.

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 12587261 - 2² = 12587257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12587269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146321 + ... + 146406.

It is an arithmetic number, because the mean of its divisors is an integer number (3220008).

Almost surely, 2^12587261 is an apocalyptic number.

It is an amenable number.

12587261 is a deficient number, since it is larger than the sum of its proper divisors (292771).

12587261 is an equidigital number, since it uses as much as digits as its factorization.

12587261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292770.

The product of its digits is 6720, while the sum is 32.

The square root of 12587261 is about 3547.8530127388. The cubic root of 12587261 is about 232.6182294588.

The spelling of 12587261 in words is "twelve million, five hundred eighty-seven thousand, two hundred sixty-one".