641025043 has 4 divisors (see below), whose sum is σ = 641266648. Its totient is φ = 640783440.

The previous prime is 641025041. The next prime is 641025053. The reversal of 641025043 is 340520146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641025043 - 2¹ = 641025041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641024999 and 641025017.

It is not an unprimeable number, because it can be changed into a prime (641025041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116778 + ... + 122143.

It is an arithmetic number, because the mean of its divisors is an integer number (160316662).

Almost surely, 2^641025043 is an apocalyptic number.

641025043 is a deficient number, since it is larger than the sum of its proper divisors (241605).

641025043 is a wasteful number, since it uses less digits than its factorization.

641025043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241604.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 641025043 is about 25318.4723670288. The cubic root of 641025043 is about 862.2337114793.

Adding to 641025043 its reverse (340520146), we get a palindrome (981545189).

The spelling of 641025043 in words is "six hundred forty-one million, twenty-five thousand, forty-three".