641466 has 32 divisors (see below), whose sum is σ = 1630080. Its totient is φ = 183168.

The previous prime is 641453. The next prime is 641467. The reversal of 641466 is 664146.

It is a super-2 number, since 2×641466² = 822957258312, which contains 22 as substring.

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

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (641467) by changing a digit.

641466 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 471 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (50940).

2⁶⁴¹⁴⁶⁶ is an apocalyptic number.

641466 is an abundant number, since it is smaller than the sum of its proper divisors (988614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641466 is a wasteful number, since it uses less digits than its factorization.

641466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715 (or 1709 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 641466 is about 800.9157259038. The cubic root of 641466 is about 86.2431374502.

It can be divided in two parts, 6414 and 66, that multiplied together give a palindrome (423324).

The spelling of 641466 in words is "six hundred forty-one thousand, four hundred sixty-six".