171042949 has 16 divisors (see below), whose sum is σ = 218211840. Its totient is φ = 130178160.

The previous prime is 171042943. The next prime is 171042961. The reversal of 171042949 is 949240171.

It is not a de Polignac number, because 171042949 - 2⁹ = 171042437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171042943) 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, 22519 + ... + 29140.

It is an arithmetic number, because the mean of its divisors is an integer number (13638240).

Almost surely, 2^171042949 is an apocalyptic number.

It is an amenable number.

171042949 is a deficient number, since it is larger than the sum of its proper divisors (47168891).

171042949 is a wasteful number, since it uses less digits than its factorization.

171042949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51720.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 171042949 is about 13078.3389235789. The cubic root of 171042949 is about 555.0963758722.

It can be divided in two parts, 171042 and 949, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 171042949 in words is "one hundred seventy-one million, forty-two thousand, nine hundred forty-nine".