170105427 has 20 divisors (see below), whose sum is σ = 256587760. Its totient is φ = 112297104.

The previous prime is 170105413. The next prime is 170105431. The reversal of 170105427 is 724501071.

It is not a de Polignac number, because 170105427 - 2¹¹ = 170103379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170105427.

It is not an unprimeable number, because it can be changed into a prime (170105527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1852 + ... + 18537.

It is an arithmetic number, because the mean of its divisors is an integer number (12829388).

Almost surely, 2^170105427 is an apocalyptic number.

170105427 is a deficient number, since it is larger than the sum of its proper divisors (86482333).

170105427 is a wasteful number, since it uses less digits than its factorization.

170105427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20504 (or 20495 counting only the distinct ones).

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

The square root of 170105427 is about 13042.4471246772. The cubic root of 170105427 is about 554.0803176092.

Adding to 170105427 its reverse (724501071), we get a palindrome (894606498).

The spelling of 170105427 in words is "one hundred seventy million, one hundred five thousand, four hundred twenty-seven".