17072145 has 24 divisors (see below), whose sum is σ = 30002856. Its totient is φ = 8978688.

The previous prime is 17072123. The next prime is 17072173. The reversal of 17072145 is 54127071.

It can be written as a sum of positive squares in 4 ways, for example, as 1838736 + 15233409 = 1356^2 + 3903^2 .

It is not a de Polignac number, because 17072145 - 2⁷ = 17072017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 687 + ... + 5883.

It is an arithmetic number, because the mean of its divisors is an integer number (1250119).

Almost surely, 2^17072145 is an apocalyptic number.

17072145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17072145 is a deficient number, since it is larger than the sum of its proper divisors (12930711).

17072145 is a wasteful number, since it uses less digits than its factorization.

17072145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281 (or 5278 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 17072145 is about 4131.8452294344. The cubic root of 17072145 is about 257.4913812429.

The spelling of 17072145 in words is "seventeen million, seventy-two thousand, one hundred forty-five".