641225 has 12 divisors (see below), whose sum is σ = 856716. Its totient is φ = 473280.

The previous prime is 641213. The next prime is 641227. The reversal of 641225 is 522146.

It is a happy number.

641225 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 6 ways, for example, as 141376 + 499849 = 376^2 + 707^2 .

It is not a de Polignac number, because 641225 - 2¹² = 637129 is a prime.

It is a super-2 number, since 2×641225² = 822339001250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 641197 and 641206.

It is not an unprimeable number, because it can be changed into a prime (641227) 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, 662 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (71393).

2⁶⁴¹²²⁵ is an apocalyptic number.

641225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641225 is a deficient number, since it is larger than the sum of its proper divisors (215491).

641225 is a wasteful number, since it uses less digits than its factorization.

641225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996 (or 1991 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 641225 is about 800.7652589867. The cubic root of 641225 is about 86.2323355269.

It can be divided in two parts, 64 and 1225, that multiplied together give a square (78400 = 280²).

The spelling of 641225 in words is "six hundred forty-one thousand, two hundred twenty-five".