170681121 has 32 divisors (see below), whose sum is σ = 273611520. Its totient is φ = 104533632.

The previous prime is 170681113. The next prime is 170681131. The reversal of 170681121 is 121186071.

It is not a de Polignac number, because 170681121 - 2³ = 170681113 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (170681131) 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 31 ways as a sum of consecutive naturals, for example, 80740 + ... + 82826.

It is an arithmetic number, because the mean of its divisors is an integer number (8550360).

Almost surely, 2^170681121 is an apocalyptic number.

It is an amenable number.

170681121 is a deficient number, since it is larger than the sum of its proper divisors (102930399).

170681121 is a wasteful number, since it uses less digits than its factorization.

170681121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 170681121 is about 13064.4984978376. The cubic root of 170681121 is about 554.7046785306.

The spelling of 170681121 in words is "one hundred seventy million, six hundred eighty-one thousand, one hundred twenty-one".