171401111 has 16 divisors (see below), whose sum is σ = 198260736. Its totient is φ = 145146816.

The previous prime is 171401101. The next prime is 171401143. The reversal of 171401111 is 111104171.

It is a cyclic number.

It is not a de Polignac number, because 171401111 - 2¹⁸ = 171138967 is a prime.

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 171401111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171401101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351710 + ... + 352196.

It is an arithmetic number, because the mean of its divisors is an integer number (12391296).

Almost surely, 2^171401111 is an apocalyptic number.

171401111 is a deficient number, since it is larger than the sum of its proper divisors (26859625).

171401111 is a wasteful number, since it uses less digits than its factorization.

171401111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 28, while the sum is 17.

The square root of 171401111 is about 13092.0247097231. The cubic root of 171401111 is about 555.4835609210.

Adding to 171401111 its reverse (111104171), we get a palindrome (282505282).

The spelling of 171401111 in words is "one hundred seventy-one million, four hundred one thousand, one hundred eleven".