2581400 has 24 divisors (see below), whose sum is σ = 6002220. Its totient is φ = 1032480.

The previous prime is 2581393. The next prime is 2581409. The reversal of 2581400 is 41852.

2581400 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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581409) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6254 + ... + 6653.

2^2581400 is an apocalyptic number.

2581400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2581400 is an abundant number, since it is smaller than the sum of its proper divisors (3420820).

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

2581400 is a wasteful number, since it uses less digits than its factorization.

2581400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923 (or 12914 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2581400 is about 1606.6735822811. The cubic root of 2581400 is about 137.1782006295.

The spelling of 2581400 in words is "two million, five hundred eighty-one thousand, four hundred".