641291 has 12 divisors (see below), whose sum is σ = 781008. Its totient is φ = 515712.

The previous prime is 641287. The next prime is 641299. The reversal of 641291 is 192146.

It is a happy number.

641291 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 641291 - 2² = 641287 is a prime.

It is a super-2 number, since 2×641291² = 822508293362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1865 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (65084).

2⁶⁴¹²⁹¹ is an apocalyptic number.

641291 is a deficient number, since it is larger than the sum of its proper divisors (139717).

641291 is a wasteful number, since it uses less digits than its factorization.

641291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 341 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 641291 is about 800.8064685053. The cubic root of 641291 is about 86.2352939990.

The spelling of 641291 in words is "six hundred forty-one thousand, two hundred ninety-one".