8252421 has 8 divisors (see below), whose sum is σ = 11056224. Its totient is φ = 5475120.

The previous prime is 8252411. The next prime is 8252459. The reversal of 8252421 is 1242528.

8252421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8252421 - 2¹¹ = 8250373 is a prime.

It is a super-2 number, since 2×8252421² = 136204904722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8252391 and 8252400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8252411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5886 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (1382028).

Almost surely, 2^8252421 is an apocalyptic number.

It is an amenable number.

8252421 is a deficient number, since it is larger than the sum of its proper divisors (2803803).

8252421 is a wasteful number, since it uses less digits than its factorization.

8252421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13251.

The product of its digits is 1280, while the sum is 24.

The square root of 8252421 is about 2872.7027343601. The cubic root of 8252421 is about 202.0817644356.

Adding to 8252421 its reverse (1242528), we get a palindrome (9494949).

The spelling of 8252421 in words is "eight million, two hundred fifty-two thousand, four hundred twenty-one".