8552421 has 6 divisors (see below), whose sum is σ = 12353510. Its totient is φ = 5701608.

The previous prime is 8552381. The next prime is 8552429. The reversal of 8552421 is 1242558.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 171396 = 2895^2 + 414^2 .

It is not a de Polignac number, because 8552421 - 2⁷ = 8552293 is a prime.

It is a super-2 number, since 2×8552421² = 146287809922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8552429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 475126 + ... + 475143.

Almost surely, 2^8552421 is an apocalyptic number.

It is an amenable number.

8552421 is a deficient number, since it is larger than the sum of its proper divisors (3801089).

8552421 is a wasteful number, since it uses less digits than its factorization.

8552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950275 (or 950272 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 8552421 is about 2924.4522564063. The cubic root of 8552421 is about 204.5014337053.

Adding to 8552421 its reverse (1242558), we get a palindrome (9794979).

The spelling of 8552421 in words is "eight million, five hundred fifty-two thousand, four hundred twenty-one".