1267864 has 32 divisors (see below), whose sum is σ = 2610720. Its totient is φ = 573696.

The previous prime is 1267859. The next prime is 1267873. The reversal of 1267864 is 4687621.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7509 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (81585).

2^1267864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1267864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1305360).

1267864 is an abundant number, since it is smaller than the sum of its proper divisors (1342856).

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

1267864 is a wasteful number, since it uses less digits than its factorization.

1267864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 255 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 1267864 is about 1125.9946713906. The cubic root of 1267864 is about 108.2324667985.

It can be divided in two parts, 12 and 67864, that added together give a palindrome (67876).

The spelling of 1267864 in words is "one million, two hundred sixty-seven thousand, eight hundred sixty-four".