172856065 has 8 divisors (see below), whose sum is σ = 207537408. Its totient is φ = 138211440.

The previous prime is 172856023. The next prime is 172856069. The reversal of 172856065 is 560658271.

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

It is not a de Polignac number, because 172856065 - 2⁷ = 172855937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172856069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544 + ... + 18766.

It is an arithmetic number, because the mean of its divisors is an integer number (25942176).

Almost surely, 2^172856065 is an apocalyptic number.

It is an amenable number.

172856065 is a deficient number, since it is larger than the sum of its proper divisors (34681343).

172856065 is a wasteful number, since it uses less digits than its factorization.

172856065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18359.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 172856065 is about 13147.4737117060. The cubic root of 172856065 is about 557.0508921028.

The spelling of 172856065 in words is "one hundred seventy-two million, eight hundred fifty-six thousand, sixty-five".