17240921 has 8 divisors (see below), whose sum is σ = 17777760. Its totient is φ = 16712352.

The previous prime is 17240911. The next prime is 17240933. The reversal of 17240921 is 12904271.

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 17240921 - 2¹⁸ = 16978777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17240911) 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 7 ways as a sum of consecutive naturals, for example, 2306 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (2222220).

Almost surely, 2^17240921 is an apocalyptic number.

It is an amenable number.

17240921 is a deficient number, since it is larger than the sum of its proper divisors (536839).

17240921 is an equidigital number, since it uses as much as digits as its factorization.

17240921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 17240921 is about 4152.2188044466. The cubic root of 17240921 is about 258.3371241437.

The spelling of 17240921 in words is "seventeen million, two hundred forty thousand, nine hundred twenty-one".