1268720 has 20 divisors (see below), whose sum is σ = 2949960. Its totient is φ = 507456.

The previous prime is 1268713. The next prime is 1268731. The reversal of 1268720 is 278621.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1268720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7850 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (147498).

2^1268720 is an apocalyptic number.

1268720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268720 is an abundant number, since it is smaller than the sum of its proper divisors (1681240).

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

1268720 is a wasteful number, since it uses less digits than its factorization.

1268720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872 (or 15866 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1268720 is about 1126.3747156253. The cubic root of 1268720 is about 108.2568190816.

Subtracting from 1268720 its reverse (278621), we obtain a palindrome (990099).

The spelling of 1268720 in words is "one million, two hundred sixty-eight thousand, seven hundred twenty".