5240421 has 12 divisors (see below), whose sum is σ = 7774572. Its totient is φ = 3398976.

The previous prime is 5240413. The next prime is 5240423. The reversal of 5240421 is 1240425.

5240421 is a `hidden beast` number, since 5 + 240 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4730625 + 509796 = 2175^2 + 714^2 .

It is not a de Polignac number, because 5240421 - 2³ = 5240413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5240394 and 5240403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5240423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7536 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (647881).

Almost surely, 2^5240421 is an apocalyptic number.

It is an amenable number.

5240421 is a deficient number, since it is larger than the sum of its proper divisors (2534151).

5240421 is a wasteful number, since it uses less digits than its factorization.

5240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780 (or 15777 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 5240421 is about 2289.1965839569. The cubic root of 5240421 is about 173.6955635757.

Adding to 5240421 its reverse (1240425), we get a palindrome (6480846).

It can be divided in two parts, 52404 and 21, that added together give a palindrome (52425).

The spelling of 5240421 in words is "five million, two hundred forty thousand, four hundred twenty-one".