2521680 has 160 divisors (see below), whose sum is σ = 9523200. Its totient is φ = 539136.

The previous prime is 2521643. The next prime is 2521681. The reversal of 2521680 is 861252.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2521680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31881 + ... + 31959.

It is an arithmetic number, because the mean of its divisors is an integer number (59520).

2^2521680 is an apocalyptic number.

2521680 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 2521680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4761600).

2521680 is an abundant number, since it is smaller than the sum of its proper divisors (7001520).

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

2521680 is a wasteful number, since it uses less digits than its factorization.

2521680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2521680 is about 1587.9798487386. The cubic root of 2521680 is about 136.1120760109.

The spelling of 2521680 in words is "two million, five hundred twenty-one thousand, six hundred eighty".