17129945 has 8 divisors (see below), whose sum is σ = 23492544. Its totient is φ = 11746224.

The previous prime is 17129929. The next prime is 17129947. The reversal of 17129945 is 54992171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17129945 - 2⁴ = 17129929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17129899 and 17129908.

It is not an unprimeable number, because it can be changed into a prime (17129947) 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, 244679 + ... + 244748.

It is an arithmetic number, because the mean of its divisors is an integer number (2936568).

Almost surely, 2^17129945 is an apocalyptic number.

It is an amenable number.

17129945 is a deficient number, since it is larger than the sum of its proper divisors (6362599).

17129945 is an equidigital number, since it uses as much as digits as its factorization.

17129945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489439.

The product of its digits is 22680, while the sum is 38.

The square root of 17129945 is about 4138.8337729365. The cubic root of 17129945 is about 257.7816442656.

The spelling of 17129945 in words is "seventeen million, one hundred twenty-nine thousand, nine hundred forty-five".