8421601 has 8 divisors (see below), whose sum is σ = 8749440. Its totient is φ = 8100048.

The previous prime is 8421587. The next prime is 8421619. The reversal of 8421601 is 1061248.

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

It is a cyclic number.

It is not a de Polignac number, because 8421601 - 2¹¹ = 8419553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8421641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^8421601 is an apocalyptic number.

It is an amenable number.

8421601 is a deficient number, since it is larger than the sum of its proper divisors (327839).

8421601 is a wasteful number, since it uses less digits than its factorization.

8421601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8421601 is about 2901.9994831150. Note that the first 3 decimals coincide. The cubic root of 8421601 is about 203.4533696562.

Adding to 8421601 its reverse (1061248), we get a palindrome (9482849).

The spelling of 8421601 in words is "eight million, four hundred twenty-one thousand, six hundred one".