2421900 has 180 divisors, whose sum is σ = 8822352. Its totient is φ = 570240.

The previous prime is 2421893. The next prime is 2421901. The reversal of 2421900 is 91242.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×2421900² = 11731199220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421901) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 105289 + ... + 105311.

2^2421900 is an apocalyptic number.

2421900 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 2421900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4411176).

2421900 is an abundant number, since it is smaller than the sum of its proper divisors (6400452).

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

2421900 is a wasteful number, since it uses less digits than its factorization.

2421900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 46 counting only the distinct ones).

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

The square root of 2421900 is about 1556.2454819212. The cubic root of 2421900 is about 134.2925959525.

It can be divided in two parts, 2421 and 900, that added together give a triangular number (3321 = T₈₁).

The spelling of 2421900 in words is "two million, four hundred twenty-one thousand, nine hundred".