1296720 has 60 divisors (see below), whose sum is σ = 4357236. Its totient is φ = 345600.

The previous prime is 1296703. The next prime is 1296721. The reversal of 1296720 is 276921.

It can be written as a sum of positive squares in 2 ways, for example, as 304704 + 992016 = 552^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181 + ... + 1620.

2^1296720 is an apocalyptic number.

1296720 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 1296720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2178618).

1296720 is an abundant number, since it is smaller than the sum of its proper divisors (3060516).

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

1296720 is a wasteful number, since it uses less digits than its factorization.

1296720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1296720 is about 1138.7361415183. The cubic root of 1296720 is about 109.0474220610.

It can be divided in two parts, 1296 and 720, that added together give a triangular number (2016 = T₆₃).

The spelling of 1296720 in words is "one million, two hundred ninety-six thousand, seven hundred twenty".