1266885 has 24 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 660192.

The previous prime is 1266883. The next prime is 1266893. The reversal of 1266885 is 5886621.

It is a happy number.

It is not a de Polignac number, because 1266885 - 2¹ = 1266883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1816 + ... + 2414.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2^1266885 is an apocalyptic number.

1266885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266885 is a deficient number, since it is larger than the sum of its proper divisors (979515).

1266885 is a wasteful number, since it uses less digits than its factorization.

1266885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 654 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1266885 is about 1125.5598606916. The cubic root of 1266885 is about 108.2046018568.

The spelling of 1266885 in words is "one million, two hundred sixty-six thousand, eight hundred eighty-five".