1266720 has 192 divisors, whose sum is σ = 5080320. Its totient is φ = 258048.

The previous prime is 1266719. The next prime is 1266731. The reversal of 1266720 is 276621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43666 + ... + 43694.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2^1266720 is an apocalyptic number.

1266720 is a gapful number since it is divisible by the number (10) 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 1266720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

1266720 is an abundant number, since it is smaller than the sum of its proper divisors (3813600).

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

1266720 is a wasteful number, since it uses less digits than its factorization.

1266720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1266720 is about 1125.4865614480. The cubic root of 1266720 is about 108.1999041048.

Subtracting from 1266720 its reverse (276621), we obtain a palindrome (990099).

The spelling of 1266720 in words is "one million, two hundred sixty-six thousand, seven hundred twenty".