172143071 has 4 divisors (see below), whose sum is σ = 182269152. Its totient is φ = 162016992.

The previous prime is 172143029. The next prime is 172143091. The reversal of 172143071 is 170341271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172143071 - 2⁶ = 172143007 is a prime.

It is a super-2 number, since 2×172143071² = 59266473786622082, which contains 22 as substring.

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 172143071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172143011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5063015 + ... + 5063048.

It is an arithmetic number, because the mean of its divisors is an integer number (45567288).

Almost surely, 2^172143071 is an apocalyptic number.

172143071 is a deficient number, since it is larger than the sum of its proper divisors (10126081).

172143071 is a wasteful number, since it uses less digits than its factorization.

172143071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126080.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 172143071 is about 13120.3304455338. The cubic root of 172143071 is about 556.2839316758.

The spelling of 172143071 in words is "one hundred seventy-two million, one hundred forty-three thousand, seventy-one".