2521536 has 56 divisors (see below), whose sum is σ = 6973824. Its totient is φ = 802560.

The previous prime is 2521517. The next prime is 2521537. The reversal of 2521536 is 6351252.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521537) 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, 4131 + ... + 4701.

2^2521536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3486912).

2521536 is an abundant number, since it is smaller than the sum of its proper divisors (4452288).

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

2521536 is a wasteful number, since it uses less digits than its factorization.

2521536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 599 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 2521536 is about 1587.9345074656. The cubic root of 2521536 is about 136.1094850778.

Adding to 2521536 its reverse (6351252), we get a palindrome (8872788).

The spelling of 2521536 in words is "two million, five hundred twenty-one thousand, five hundred thirty-six".