1267668 has 36 divisors (see below), whose sum is σ = 3345888. Its totient is φ = 403920.

The previous prime is 1267663. The next prime is 1267681. The reversal of 1267668 is 8667621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63 + ... + 1593.

2^1267668 is an apocalyptic number.

1267668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1267668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672944).

1267668 is an abundant number, since it is smaller than the sum of its proper divisors (2078220).

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

1267668 is a wasteful number, since it uses less digits than its factorization.

1267668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1559 counting only the distinct ones).

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

The square root of 1267668 is about 1125.9076338670. The cubic root of 1267668 is about 108.2268892664.

The spelling of 1267668 in words is "one million, two hundred sixty-seven thousand, six hundred sixty-eight".