1316720 has 40 divisors (see below), whose sum is σ = 3109920. Its totient is φ = 518400.

The previous prime is 1316717. The next prime is 1316729. The reversal of 1316720 is 276131.

It is a happy number.

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 = 1316692 and 1316701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316729) 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, 8645 + ... + 8795.

It is an arithmetic number, because the mean of its divisors is an integer number (77748).

2^1316720 is an apocalyptic number.

1316720 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 1316720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554960).

1316720 is an abundant number, since it is smaller than the sum of its proper divisors (1793200).

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

1316720 is a wasteful number, since it uses less digits than its factorization.

1316720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1316720 is about 1147.4842046843. The cubic root of 1316720 is about 109.6051962656.

The spelling of 1316720 in words is "one million, three hundred sixteen thousand, seven hundred twenty".