2504520 has 80 divisors (see below), whose sum is σ = 8428860. Its totient is φ = 667008.

The previous prime is 2504519. The next prime is 2504531. The reversal of 2504520 is 254052.

It can be written as a sum of positive squares in 2 ways, for example, as 2232036 + 272484 = 1494^2 + 522^2 .

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 = 2504493 and 2504502.

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, 2854 + ... + 3626.

2^2504520 is an apocalyptic number.

2504520 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 2504520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4214430).

2504520 is an abundant number, since it is smaller than the sum of its proper divisors (5924340).

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

2504520 is a wasteful number, since it uses less digits than its factorization.

2504520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2504520 is about 1582.5675341040. The cubic root of 2504520 is about 135.8026260353.

Adding to 2504520 its reverse (254052), we get a palindrome (2758572).

The spelling of 2504520 in words is "two million, five hundred four thousand, five hundred twenty".