641025 has 72 divisors (see below), whose sum is σ = 1470144. Its totient is φ = 259200.

The previous prime is 640993. The next prime is 641051. The reversal of 641025 is 520146.

It is a happy number.

641025 is a `hidden beast` number, since 641 + 0 + 25 = 666.

It is not a de Polignac number, because 641025 - 2⁵ = 640993 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 640989 and 641007.

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 641025.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17307 + ... + 17343.

It is a Proth number, since it is equal to 313 ⋅ 2¹¹ + 1 and 313 < 2¹¹.

2⁶⁴¹⁰²⁵ is an apocalyptic number.

It is an amenable number.

641025 is an abundant number, since it is smaller than the sum of its proper divisors (829119).

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

641025 is a wasteful number, since it uses less digits than its factorization.

641025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 641025 is about 800.6403687050. The cubic root of 641025 is about 86.2233692200.

It can be divided in two parts, 64 and 1025, that added together give a square (1089 = 33²).

The spelling of 641025 in words is "six hundred forty-one thousand, twenty-five".