1266287 has 4 divisors (see below), whose sum is σ = 1381416. Its totient is φ = 1151160.

The previous prime is 1266281. The next prime is 1266301. The reversal of 1266287 is 7826621.

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 1266287 - 2⁴ = 1266271 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 (1266281) 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, 57548 + ... + 57569.

It is an arithmetic number, because the mean of its divisors is an integer number (345354).

2^1266287 is an apocalyptic number.

1266287 is a deficient number, since it is larger than the sum of its proper divisors (115129).

1266287 is a wasteful number, since it uses less digits than its factorization.

1266287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115128.

The product of its digits is 8064, while the sum is 32.

The square root of 1266287 is about 1125.2941837582. The cubic root of 1266287 is about 108.1875741246.

The spelling of 1266287 in words is "one million, two hundred sixty-six thousand, two hundred eighty-seven".