2520720 has 100 divisors (see below), whose sum is σ = 8777340. Its totient is φ = 670464.

The previous prime is 2520697. The next prime is 2520769. The reversal of 2520720 is 270252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 1774224 = 864^2 + 1332^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2520693 and 2520702.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6286 + ... + 6674.

2^2520720 is an apocalyptic number.

2520720 is a gapful number since it is divisible by the number (20) 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 2520720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4388670).

2520720 is an abundant number, since it is smaller than the sum of its proper divisors (6256620).

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

2520720 is a wasteful number, since it uses less digits than its factorization.

2520720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 2520720 is about 1587.6775491264. The cubic root of 2520720 is about 136.0948012604.

Adding to 2520720 its reverse (270252), we get a palindrome (2790972).

It can be divided in two parts, 2520 and 720, that added together give a triangular number (3240 = T₈₀).

The spelling of 2520720 in words is "two million, five hundred twenty thousand, seven hundred twenty".