5252421 has 4 divisors (see below), whose sum is σ = 7003232. Its totient is φ = 3501612.

The previous prime is 5252419. The next prime is 5252447. The reversal of 5252421 is 1242525.

It is a happy number.

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 not a de Polignac number, because 5252421 - 2¹ = 5252419 is a prime.

It is a super-2 number, since 2×5252421² = 55175852722482, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5252411) 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, 875401 + ... + 875406.

It is an arithmetic number, because the mean of its divisors is an integer number (1750808).

Almost surely, 2^5252421 is an apocalyptic number.

It is an amenable number.

5252421 is a deficient number, since it is larger than the sum of its proper divisors (1750811).

5252421 is a wasteful number, since it uses less digits than its factorization.

5252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750810.

The product of its digits is 800, while the sum is 21.

The square root of 5252421 is about 2291.8160920981. The cubic root of 5252421 is about 173.8280438864.

Adding to 5252421 its reverse (1242525), we get a palindrome (6494946).

The spelling of 5252421 in words is "five million, two hundred fifty-two thousand, four hundred twenty-one".