17247121 has 4 divisors (see below), whose sum is σ = 17289700. Its totient is φ = 17204544.

The previous prime is 17247119. The next prime is 17247133. The reversal of 17247121 is 12174271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16516096 + 731025 = 4064^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 17247121 - 2¹ = 17247119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17247161) 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 in 3 ways as a sum of consecutive naturals, for example, 20676 + ... + 21493.

It is an arithmetic number, because the mean of its divisors is an integer number (4322425).

Almost surely, 2^17247121 is an apocalyptic number.

It is an amenable number.

17247121 is a deficient number, since it is larger than the sum of its proper divisors (42579).

17247121 is an equidigital number, since it uses as much as digits as its factorization.

17247121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42578.

The product of its digits is 784, while the sum is 25.

The square root of 17247121 is about 4152.9653261254. The cubic root of 17247121 is about 258.3680872656.

The spelling of 17247121 in words is "seventeen million, two hundred forty-seven thousand, one hundred twenty-one".