172065641 has 4 divisors (see below), whose sum is σ = 187707984. Its totient is φ = 156423300.

The previous prime is 172065631. The next prime is 172065703. The reversal of 172065641 is 146560271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 172065641 - 2¹⁰ = 172064617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172065598 and 172065607.

It is not an unprimeable number, because it can be changed into a prime (172065601) 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 3 ways as a sum of consecutive naturals, for example, 7821155 + ... + 7821176.

It is an arithmetic number, because the mean of its divisors is an integer number (46926996).

Almost surely, 2^172065641 is an apocalyptic number.

172065641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172065641 is a deficient number, since it is larger than the sum of its proper divisors (15642343).

172065641 is a wasteful number, since it uses less digits than its factorization.

172065641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15642342.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 172065641 is about 13117.3793495500. The cubic root of 172065641 is about 556.2005136130.

The spelling of 172065641 in words is "one hundred seventy-two million, sixty-five thousand, six hundred forty-one".