1366720 has 28 divisors (see below), whose sum is σ = 3255264. Its totient is φ = 546560.

The previous prime is 1366709. The next prime is 1366721. The reversal of 1366720 is 276631.

1366720 = 33² + 34² + ... + 160².

It is not an unprimeable number, because it can be changed into a prime (1366721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816 + ... + 2455.

2^1366720 is an apocalyptic number.

1366720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366720 is an abundant number, since it is smaller than the sum of its proper divisors (1888544).

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

1366720 is an equidigital number, since it uses as much as digits as its factorization.

1366720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288 (or 4278 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1366720 is about 1169.0680048654. The cubic root of 1366720 is about 110.9753482577.

The spelling of 1366720 in words is "one million, three hundred sixty-six thousand, seven hundred twenty".