2921400 has 96 divisors (see below), whose sum is σ = 10081200. Its totient is φ = 777600.

The previous prime is 2921371. The next prime is 2921417. The reversal of 2921400 is 41292.

2921400 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 (18).

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 23 ways as a sum of consecutive naturals, for example, 5130 + ... + 5670.

2^2921400 is an apocalyptic number.

2921400 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 2921400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5040600).

2921400 is an abundant number, since it is smaller than the sum of its proper divisors (7159800).

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

2921400 is a wasteful number, since it uses less digits than its factorization.

2921400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2921400 is about 1709.2103439893. The cubic root of 2921400 is about 142.9542292428.

Adding to 2921400 its reverse (41292), we get a palindrome (2962692).

It can be divided in two parts, 2921 and 400, that added together give a triangular number (3321 = T₈₁).

The spelling of 2921400 in words is "two million, nine hundred twenty-one thousand, four hundred".