2421144 has 64 divisors (see below), whose sum is σ = 7344000. Its totient is φ = 732960.

The previous prime is 2421137. The next prime is 2421149. The reversal of 2421144 is 4411242.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867 + ... + 2885.

It is an arithmetic number, because the mean of its divisors is an integer number (114750).

2^2421144 is an apocalyptic number.

2421144 is a gapful number since it is divisible by the number (24) 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 2421144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3672000).

2421144 is an abundant number, since it is smaller than the sum of its proper divisors (4922856).

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

2421144 is a wasteful number, since it uses less digits than its factorization.

2421144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1035 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 2421144 is about 1556.0025706920. The cubic root of 2421144 is about 134.2786212813.

Adding to 2421144 its reverse (4411242), we get a palindrome (6832386).

The spelling of 2421144 in words is "two million, four hundred twenty-one thousand, one hundred forty-four".