172047161 has 8 divisors (see below), whose sum is σ = 202125504. Its totient is φ = 144375120.

The previous prime is 172047143. The next prime is 172047163. The reversal of 172047161 is 161740271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172047161 - 2⁶ = 172047097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172047163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601421 + ... + 601706.

It is an arithmetic number, because the mean of its divisors is an integer number (25265688).

Almost surely, 2^172047161 is an apocalyptic number.

172047161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172047161 is a deficient number, since it is larger than the sum of its proper divisors (30078343).

172047161 is a wasteful number, since it uses less digits than its factorization.

172047161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203151.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 172047161 is about 13116.6749216408. The cubic root of 172047161 is about 556.1806007599.

The spelling of 172047161 in words is "one hundred seventy-two million, forty-seven thousand, one hundred sixty-one".