641001225 has 12 divisors (see below), whose sum is σ = 1059788816. Its totient is φ = 341867280.

The previous prime is 641001223. The next prime is 641001241. The reversal of 641001225 is 522100146.

It is not a de Polignac number, because 641001225 - 2¹ = 641001223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641001223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4273267 + ... + 4273416.

Almost surely, 2^641001225 is an apocalyptic number.

It is an amenable number.

641001225 is a deficient number, since it is larger than the sum of its proper divisors (418787591).

641001225 is a wasteful number, since it uses less digits than its factorization.

641001225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546696 (or 8546691 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 641001225 is about 25318.0019946282. The cubic root of 641001225 is about 862.2230322621.

The spelling of 641001225 in words is "six hundred forty-one million, one thousand, two hundred twenty-five".