1266320 has 40 divisors (see below), whose sum is σ = 3214080. Its totient is φ = 460160.

The previous prime is 1266301. The next prime is 1266323. The reversal of 1266320 is 236621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1266292 and 1266301.

It is not an unprimeable number, because it can be changed into a prime (1266323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (80352).

2^1266320 is an apocalyptic number.

1266320 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 1266320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607040).

1266320 is an abundant number, since it is smaller than the sum of its proper divisors (1947760).

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

1266320 is a wasteful number, since it uses less digits than its factorization.

1266320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1266320 is about 1125.3088464950. The cubic root of 1266320 is about 108.1885139218.

It can be divided in two parts, 126 and 6320, that added together give a palindrome (6446).

The spelling of 1266320 in words is "one million, two hundred sixty-six thousand, three hundred twenty".