170672121 has 24 divisors (see below), whose sum is σ = 257976576. Its totient is φ = 108525120.

The previous prime is 170672111. The next prime is 170672209. The reversal of 170672121 is 121276071.

It is not a de Polignac number, because 170672121 - 2⁹ = 170671609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (170672111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88261 + ... + 90173.

It is an arithmetic number, because the mean of its divisors is an integer number (10749024).

Almost surely, 2^170672121 is an apocalyptic number.

It is an amenable number.

170672121 is a deficient number, since it is larger than the sum of its proper divisors (87304455).

170672121 is a wasteful number, since it uses less digits than its factorization.

170672121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2370 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 170672121 is about 13064.1540483875. The cubic root of 170672121 is about 554.6949285168.

The spelling of 170672121 in words is "one hundred seventy million, six hundred seventy-two thousand, one hundred twenty-one".