170427985 has 32 divisors (see below), whose sum is σ = 252564480. Its totient is φ = 107509248.

The previous prime is 170427979. The next prime is 170427989. The reversal of 170427985 is 589724071.

It is not a de Polignac number, because 170427985 - 2²³ = 162039377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (170427989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210261 + ... + 211069.

It is an arithmetic number, because the mean of its divisors is an integer number (7892640).

Almost surely, 2^170427985 is an apocalyptic number.

It is an amenable number.

170427985 is a deficient number, since it is larger than the sum of its proper divisors (82136495).

170427985 is a wasteful number, since it uses less digits than its factorization.

170427985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 170427985 is about 13054.8069690823. The cubic root of 170427985 is about 554.4303166163.

The spelling of 170427985 in words is "one hundred seventy million, four hundred twenty-seven thousand, nine hundred eighty-five".