2521920 has 112 divisors (see below), whose sum is σ = 8339328. Its totient is φ = 645120.

The previous prime is 2521919. The next prime is 2521921. The reversal of 2521920 is 291252.

It is an interprime number because it is at equal distance from previous prime (2521919) and next prime (2521921).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35485 + ... + 35555.

2^2521920 is an apocalyptic number.

2521920 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 2521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4169664).

2521920 is an abundant number, since it is smaller than the sum of its proper divisors (5817408).

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

2521920 is a wasteful number, since it uses less digits than its factorization.

2521920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2521920 is about 1588.0554146503. The cubic root of 2521920 is about 136.1163940134.

It can be divided in two parts, 25 and 21920, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 2521920 in words is "two million, five hundred twenty-one thousand, nine hundred twenty".