171400121 has 16 divisors (see below), whose sum is σ = 187483200. Its totient is φ = 156074688.

The previous prime is 171400109. The next prime is 171400123. The reversal of 171400121 is 121004171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171400121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 171400121.

It is not an unprimeable number, because it can be changed into a prime (171400123) 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 15 ways as a sum of consecutive naturals, for example, 152066 + ... + 153188.

It is an arithmetic number, because the mean of its divisors is an integer number (11717700).

Almost surely, 2^171400121 is an apocalyptic number.

It is an amenable number.

171400121 is a deficient number, since it is larger than the sum of its proper divisors (16083079).

171400121 is a wasteful number, since it uses less digits than its factorization.

171400121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 171400121 is about 13091.9869003906. The cubic root of 171400121 is about 555.4824914417.

Adding to 171400121 its reverse (121004171), we get a palindrome (292404292).

The spelling of 171400121 in words is "one hundred seventy-one million, four hundred thousand, one hundred twenty-one".