2421243 has 24 divisors (see below), whose sum is σ = 3924336. Its totient is φ = 1425600.

The previous prime is 2421229. The next prime is 2421247. The reversal of 2421243 is 3421242.

2421243 is a `hidden beast` number, since 2 + 421 + 243 = 666.

It is not a de Polignac number, because 2421243 - 2¹³ = 2413051 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2421247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3333 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (163514).

2^2421243 is an apocalyptic number.

2421243 is a deficient number, since it is larger than the sum of its proper divisors (1503093).

2421243 is a wasteful number, since it uses less digits than its factorization.

2421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 712 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 2421243 is about 1556.0343826535. The cubic root of 2421243 is about 134.2804514633.

Adding to 2421243 its reverse (3421242), we get a palindrome (5842485).

Subtracting 2421243 from its reverse (3421242), we obtain a palindrome (999999).

It can be divided in two parts, 242 and 1243, that added together give a triangular number (1485 = T₅₄).

The spelling of 2421243 in words is "two million, four hundred twenty-one thousand, two hundred forty-three".