2521400 has 48 divisors (see below), whose sum is σ = 6703440. Its totient is φ = 864000.

The previous prime is 2521397. The next prime is 2521417. The reversal of 2521400 is 41252.

2521400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (139655).

2^2521400 is an apocalyptic number.

2521400 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 2521400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3351720).

2521400 is an abundant number, since it is smaller than the sum of its proper divisors (4182040).

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

2521400 is a wasteful number, since it uses less digits than its factorization.

2521400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2521400 is about 1587.8916839634. The cubic root of 2521400 is about 136.1070379949.

Adding to 2521400 its reverse (41252), we get a palindrome (2562652).

The spelling of 2521400 in words is "two million, five hundred twenty-one thousand, four hundred".