2444421 has 16 divisors (see below), whose sum is σ = 3812864. Its totient is φ = 1363824.

The previous prime is 2444411. The next prime is 2444437. The reversal of 2444421 is 1244442.

It is not a de Polignac number, because 2444421 - 2⁶ = 2444357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

2444421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444401) 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, 451 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (238304).

2^2444421 is an apocalyptic number.

2444421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2444421 is the 903-rd octagonal number.

It is an amenable number.

2444421 is a deficient number, since it is larger than the sum of its proper divisors (1368443).

2444421 is a wasteful number, since it uses less digits than its factorization.

2444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its digits is 1024, while the sum is 21.

The square root of 2444421 is about 1563.4644223646. The cubic root of 2444421 is about 134.7075700286.

Adding to 2444421 its sum of digits (21), we get a palindrome (2444442).

Adding to 2444421 its reverse (1244442), we get a palindrome (3688863).

The spelling of 2444421 in words is "two million, four hundred forty-four thousand, four hundred twenty-one".