641265 has 8 divisors (see below), whose sum is σ = 1026048. Its totient is φ = 342000.

The previous prime is 641261. The next prime is 641279. The reversal of 641265 is 562146.

641265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 641265 - 2² = 641261 is a prime.

It is a super-2 number, since 2×641265² = 822441600450, which contains 22 as substring.

641265 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (641261) 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, 21361 + ... + 21390.

It is an arithmetic number, because the mean of its divisors is an integer number (128256).

2⁶⁴¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

641265 is a deficient number, since it is larger than the sum of its proper divisors (384783).

641265 is a wasteful number, since it uses less digits than its factorization.

641265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42759.

The product of its digits is 1440, while the sum is 24.

The square root of 641265 is about 800.7902347057. The cubic root of 641265 is about 86.2341285646.

The spelling of 641265 in words is "six hundred forty-one thousand, two hundred sixty-five".