12257287 has 4 divisors (see below), whose sum is σ = 14008336. Its totient is φ = 10506240.

The previous prime is 12257281. The next prime is 12257291. The reversal of 12257287 is 78275221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12257287 - 2²³ = 3868679 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 (12257281) 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, 875514 + ... + 875527.

It is an arithmetic number, because the mean of its divisors is an integer number (3502084).

Almost surely, 2^12257287 is an apocalyptic number.

12257287 is a deficient number, since it is larger than the sum of its proper divisors (1751049).

12257287 is an equidigital number, since it uses as much as digits as its factorization.

12257287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751048.

The product of its digits is 15680, while the sum is 34.

The square root of 12257287 is about 3501.0408452345. The cubic root of 12257287 is about 230.5675147251.

It can be divided in two parts, 12257 and 287, that added together give a square (12544 = 112²).

The spelling of 12257287 in words is "twelve million, two hundred fifty-seven thousand, two hundred eighty-seven".