2102400 has 144 divisors (see below), whose sum is σ = 7604610. Its totient is φ = 552960.

The previous prime is 2102383. The next prime is 2102411. The reversal of 2102400 is 42012.

It can be written as a sum of positive squares in 3 ways, for example, as 1617984 + 484416 = 1272^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28764 + ... + 28836.

2^2102400 is an apocalyptic number.

2102400 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 2102400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3802305).

2102400 is an abundant number, since it is smaller than the sum of its proper divisors (5502210).

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

2102400 is a wasteful number, since it uses less digits than its factorization.

2102400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2102400 is about 1449.9655168313. The cubic root of 2102400 is about 128.1066818944.

Adding to 2102400 its reverse (42012), we get a palindrome (2144412).

The spelling of 2102400 in words is "two million, one hundred two thousand, four hundred".