641493 has 16 divisors (see below), whose sum is σ = 992640. Its totient is φ = 408672.

The previous prime is 641491. The next prime is 641513. The reversal of 641493 is 394146.

It is not a de Polignac number, because 641493 - 2¹ = 641491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (62040).

2⁶⁴¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

641493 is a deficient number, since it is larger than the sum of its proper divisors (351147).

641493 is a wasteful number, since it uses less digits than its factorization.

641493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1059 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 641493 is about 800.9325814324. The cubic root of 641493 is about 86.2443474556.

The spelling of 641493 in words is "six hundred forty-one thousand, four hundred ninety-three".