5240021 has 4 divisors (see below), whose sum is σ = 5467872. Its totient is φ = 5012172.

The previous prime is 5240017. The next prime is 5240033. The reversal of 5240021 is 1200425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5240021 - 2² = 5240017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5239978 and 5240005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5240621) 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, 113891 + ... + 113936.

It is an arithmetic number, because the mean of its divisors is an integer number (1366968).

Almost surely, 2^5240021 is an apocalyptic number.

It is an amenable number.

5240021 is a deficient number, since it is larger than the sum of its proper divisors (227851).

5240021 is a wasteful number, since it uses less digits than its factorization.

5240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227850.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 5240021 is about 2289.1092153936. The cubic root of 5240021 is about 173.6911440839.

Adding to 5240021 its reverse (1200425), we get a palindrome (6440446).

The spelling of 5240021 in words is "five million, two hundred forty thousand, twenty-one".