8921601 has 12 divisors (see below), whose sum is σ = 13878228. Its totient is φ = 5490144.

The previous prime is 8921599. The next prime is 8921603. The reversal of 8921601 is 1061298.

It is an interprime number because it is at equal distance from previous prime (8921599) and next prime (8921603).

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 7017201 = 1380^2 + 2649^2 .

It is not a de Polignac number, because 8921601 - 2¹ = 8921599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8921603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38010 + ... + 38243.

It is an arithmetic number, because the mean of its divisors is an integer number (1156519).

Almost surely, 2^8921601 is an apocalyptic number.

It is an amenable number.

8921601 is a deficient number, since it is larger than the sum of its proper divisors (4956627).

8921601 is a wasteful number, since it uses less digits than its factorization.

8921601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76272 (or 76269 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 8921601 is about 2986.9049198125. The cubic root of 8921601 is about 207.4026329853.

Adding to 8921601 its reverse (1061298), we get a palindrome (9982899).

The spelling of 8921601 in words is "eight million, nine hundred twenty-one thousand, six hundred one".