8221601 has 4 divisors (see below), whose sum is σ = 8227632. Its totient is φ = 8215572.

The previous prime is 8221597. The next prime is 8221621. The reversal of 8221601 is 1061228.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8221601 - 2² = 8221597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221621) 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, 110 + ... + 4056.

It is an arithmetic number, because the mean of its divisors is an integer number (2056908).

Almost surely, 2^8221601 is an apocalyptic number.

It is an amenable number.

8221601 is a deficient number, since it is larger than the sum of its proper divisors (6031).

8221601 is a wasteful number, since it uses less digits than its factorization.

8221601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 8221601 is about 2867.3334302100. Note that the first 3 decimals coincide. The cubic root of 8221601 is about 201.8298816057.

Adding to 8221601 its reverse (1061228), we get a palindrome (9282829).

The spelling of 8221601 in words is "eight million, two hundred twenty-one thousand, six hundred one".