641517 has 8 divisors (see below), whose sum is σ = 875424. Its totient is φ = 417648.

The previous prime is 641513. The next prime is 641519. The reversal of 641517 is 715146.

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

It is not a de Polignac number, because 641517 - 2² = 641513 is a prime.

It is a super-2 number, since 2×641517² = 823088122578, which contains 22 as substring.

641517 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641513) 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, 2358 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (109428).

2⁶⁴¹⁵¹⁷ is an apocalyptic number.

It is an amenable number.

641517 is a deficient number, since it is larger than the sum of its proper divisors (233907).

641517 is a wasteful number, since it uses less digits than its factorization.

641517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019.

The product of its digits is 840, while the sum is 24.

The square root of 641517 is about 800.9475638267. The cubic root of 641517 is about 86.2454229875.

The spelling of 641517 in words is "six hundred forty-one thousand, five hundred seventeen".