2644421 has 4 divisors (see below), whose sum is σ = 2847852. Its totient is φ = 2440992.

The previous prime is 2644409. The next prime is 2644429. The reversal of 2644421 is 1244462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 835396 = 1345^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644421 - 2⁶ = 2644357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101696 + ... + 101721.

It is an arithmetic number, because the mean of its divisors is an integer number (711963).

2^2644421 is an apocalyptic number.

It is an amenable number.

2644421 is a deficient number, since it is larger than the sum of its proper divisors (203431).

2644421 is a wasteful number, since it uses less digits than its factorization.

2644421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203430.

The product of its digits is 1536, while the sum is 23.

The square root of 2644421 is about 1626.1675805402. The cubic root of 2644421 is about 138.2855705173.

Adding to 2644421 its reverse (1244462), we get a palindrome (3888883).

The spelling of 2644421 in words is "two million, six hundred forty-four thousand, four hundred twenty-one".