641217 has 8 divisors (see below), whose sum is σ = 892224. Its totient is φ = 408848.

The previous prime is 641213. The next prime is 641227. The reversal of 641217 is 712146.

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

It is not a de Polignac number, because 641217 - 2² = 641213 is a prime.

It is a super-2 number, since 2×641217² = 822318482178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641193 and 641202.

It is not an unprimeable number, because it can be changed into a prime (641213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4578 + ... + 4715.

It is an arithmetic number, because the mean of its divisors is an integer number (111528).

2⁶⁴¹²¹⁷ is an apocalyptic number.

It is an amenable number.

641217 is a deficient number, since it is larger than the sum of its proper divisors (251007).

641217 is a wasteful number, since it uses less digits than its factorization.

641217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319.

The product of its digits is 336, while the sum is 21.

The square root of 641217 is about 800.7602637494. The cubic root of 641217 is about 86.2319769104.

It can be divided in two parts, 641 and 217, that added together give a palindrome (858).

The spelling of 641217 in words is "six hundred forty-one thousand, two hundred seventeen".