641470 has 16 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 245344.

The previous prime is 641467. The next prime is 641471. The reversal of 641470 is 74146.

It is a super-2 number, since 2×641470² = 822967521800, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641470.

It is not an unprimeable number, because it can be changed into a prime (641471) 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, 1165 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2⁶⁴¹⁴⁷⁰ is an apocalyptic number.

641470 is a deficient number, since it is larger than the sum of its proper divisors (563810).

641470 is a wasteful number, since it uses less digits than its factorization.

641470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 641470 is about 800.9182230415. The cubic root of 641470 is about 86.2433167124.

It can be divided in two parts, 641 and 470, that added together give a palindrome (1111).

The spelling of 641470 in words is "six hundred forty-one thousand, four hundred seventy".