17221265 has 4 divisors (see below), whose sum is σ = 20665524. Its totient is φ = 13777008.

The previous prime is 17221231. The next prime is 17221279. The reversal of 17221265 is 56212271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56212271 = 41 ⋅1371031.

It can be written as a sum of positive squares in 2 ways, for example, as 10647169 + 6574096 = 3263^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 17221265 - 2¹⁰ = 17220241 is a prime.

It is a super-3 number, since 3×17221265³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722122 + ... + 1722131.

It is an arithmetic number, because the mean of its divisors is an integer number (5166381).

Almost surely, 2^17221265 is an apocalyptic number.

It is an amenable number.

17221265 is a deficient number, since it is larger than the sum of its proper divisors (3444259).

17221265 is an equidigital number, since it uses as much as digits as its factorization.

17221265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444258.

The product of its digits is 1680, while the sum is 26.

The square root of 17221265 is about 4149.8512021517. The cubic root of 17221265 is about 258.2389119608.

The spelling of 17221265 in words is "seventeen million, two hundred twenty-one thousand, two hundred sixty-five".