1286567 has 4 divisors (see below), whose sum is σ = 1296096. Its totient is φ = 1277040.

The previous prime is 1286561. The next prime is 1286569. The reversal of 1286567 is 7656821.

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 1286567 - 2⁶ = 1286503 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 (1286561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4559 + ... + 4832.

It is an arithmetic number, because the mean of its divisors is an integer number (324024).

2^1286567 is an apocalyptic number.

1286567 is a deficient number, since it is larger than the sum of its proper divisors (9529).

1286567 is an equidigital number, since it uses as much as digits as its factorization.

1286567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528.

The product of its digits is 20160, while the sum is 35.

The square root of 1286567 is about 1134.2693683601. The cubic root of 1286567 is about 108.7620711487.

The spelling of 1286567 in words is "one million, two hundred eighty-six thousand, five hundred sixty-seven".