641318 has 4 divisors (see below), whose sum is σ = 961980. Its totient is φ = 320658.

The previous prime is 641317. The next prime is 641327. The reversal of 641318 is 813146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 813146 = 2 ⋅406573.

It is a super-2 number, since 2×641318² = 822577554248, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 641293 and 641302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160328 + ... + 160331.

It is an arithmetic number, because the mean of its divisors is an integer number (240495).

2⁶⁴¹³¹⁸ is an apocalyptic number.

641318 is a deficient number, since it is larger than the sum of its proper divisors (320662).

641318 is a wasteful number, since it uses less digits than its factorization.

641318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320661.

The product of its digits is 576, while the sum is 23.

The square root of 641318 is about 800.8233263336. The cubic root of 641318 is about 86.2365042246.

It can be divided in two parts, 641 and 318, that added together give a palindrome (959).

The spelling of 641318 in words is "six hundred forty-one thousand, three hundred eighteen".