641145421 has 8 divisors (see below), whose sum is σ = 736535744. Its totient is φ = 546704640.

The previous prime is 641145397. The next prime is 641145451. The reversal of 641145421 is 124541146.

641145421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641145421 - 2²¹ = 639048269 is a prime.

It is a super-2 number, since 2×641145421² = 822134901738534482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641145421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641145451) 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, 235935 + ... + 238636.

It is an arithmetic number, because the mean of its divisors is an integer number (92066968).

Almost surely, 2^641145421 is an apocalyptic number.

It is an amenable number.

641145421 is a deficient number, since it is larger than the sum of its proper divisors (95390323).

641145421 is a wasteful number, since it uses less digits than its factorization.

641145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474771.

The product of its digits is 3840, while the sum is 28.

The square root of 641145421 is about 25320.8495315619. The cubic root of 641145421 is about 862.2876810157.

Adding to 641145421 its reverse (124541146), we get a palindrome (765686567).

The spelling of 641145421 in words is "six hundred forty-one million, one hundred forty-five thousand, four hundred twenty-one".