1326720 has 64 divisors (see below), whose sum is σ = 4235040. Its totient is φ = 353280.

The previous prime is 1326701. The next prime is 1326727. The reversal of 1326720 is 276231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1326727) 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, 1575 + ... + 2265.

2^1326720 is an apocalyptic number.

1326720 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 1326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2117520).

1326720 is an abundant number, since it is smaller than the sum of its proper divisors (2908320).

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

1326720 is an equidigital number, since it uses as much as digits as its factorization.

1326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 1326720 is about 1151.8333212753. The cubic root of 1326720 is about 109.8819670567.

The spelling of 1326720 in words is "one million, three hundred twenty-six thousand, seven hundred twenty".