1287267 has 8 divisors (see below), whose sum is σ = 1762896. Its totient is φ = 834912.

The previous prime is 1287239. The next prime is 1287289. The reversal of 1287267 is 7627821.

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

It is not a de Polignac number, because 1287267 - 2¹² = 1283171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5688 + ... + 5909.

It is an arithmetic number, because the mean of its divisors is an integer number (220362).

2^1287267 is an apocalyptic number.

1287267 is a deficient number, since it is larger than the sum of its proper divisors (475629).

1287267 is a wasteful number, since it uses less digits than its factorization.

1287267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11637.

The product of its digits is 9408, while the sum is 33.

The square root of 1287267 is about 1134.5778950782. The cubic root of 1287267 is about 108.7817927920.

The spelling of 1287267 in words is "one million, two hundred eighty-seven thousand, two hundred sixty-seven".