9121601 has 2 divisors, whose sum is σ = 9121602. Its totient is φ = 9121600.

The previous prime is 9121561. The next prime is 9121621. The reversal of 9121601 is 1061219.

It is an a-pointer prime, because the next prime (9121621) can be obtained adding 9121601 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9006001 + 115600 = 3001^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9121601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9121621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560800 + 4560801.

It is an arithmetic number, because the mean of its divisors is an integer number (4560801).

Almost surely, 2^9121601 is an apocalyptic number.

It is an amenable number.

9121601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121601 is an equidigital number, since it uses as much as digits as its factorization.

9121601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 9121601 is about 3020.1988345140. The cubic root of 9121601 is about 208.9410103430.

It can be divided in two parts, 91 and 21601, that multiplied together give a palindrome (1965691).

The spelling of 9121601 in words is "nine million, one hundred twenty-one thousand, six hundred one".