1267866 has 32 divisors (see below), whose sum is σ = 2877120. Its totient is φ = 413712.

The previous prime is 1267859. The next prime is 1267873. The reversal of 1267866 is 6687621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1267859) and next prime (1267873).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1267866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2641 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (89910).

2^1267866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1267866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438560).

1267866 is an abundant number, since it is smaller than the sum of its proper divisors (1609254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1267866 is a wasteful number, since it uses less digits than its factorization.

1267866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 501 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1267866 is about 1125.9955594939. The cubic root of 1267866 is about 108.2325237092.

The spelling of 1267866 in words is "one million, two hundred sixty-seven thousand, eight hundred sixty-six".