1285867 has 6 divisors (see below), whose sum is σ = 1413524. Its totient is φ = 1168860.

The previous prime is 1285859. The next prime is 1285871. The reversal of 1285867 is 7685821.

It is not a de Polignac number, because 1285867 - 2³ = 1285859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5193 + ... + 5434.

2^1285867 is an apocalyptic number.

1285867 is a deficient number, since it is larger than the sum of its proper divisors (127657).

1285867 is a wasteful number, since it uses less digits than its factorization.

1285867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10649 (or 10638 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 1285867 is about 1133.9607576984. The cubic root of 1285867 is about 108.7423423507.

It can be divided in two parts, 128 and 5867, that added together give a palindrome (5995).

The spelling of 1285867 in words is "one million, two hundred eighty-five thousand, eight hundred sixty-seven".