8550621 has 18 divisors (see below), whose sum is σ = 12847770. Its totient is φ = 5473440.

The previous prime is 8550617. The next prime is 8550623. The reversal of 8550621 is 1260558.

8550621 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 632025 + 7918596 = 795^2 + 2814^2 .

It is not a de Polignac number, because 8550621 - 2² = 8550617 is a prime.

It is a super-2 number, since 2×8550621² = 146226238971282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8550623) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 47151 + ... + 47331.

It is an arithmetic number, because the mean of its divisors is an integer number (713765).

Almost surely, 2^8550621 is an apocalyptic number.

It is an amenable number.

8550621 is a deficient number, since it is larger than the sum of its proper divisors (4297149).

8550621 is a wasteful number, since it uses less digits than its factorization.

8550621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 8550621 is about 2924.1444902740. The cubic root of 8550621 is about 204.4870857833.

The spelling of 8550621 in words is "eight million, five hundred fifty thousand, six hundred twenty-one".