641425 has 6 divisors (see below), whose sum is σ = 795398. Its totient is φ = 513120.

The previous prime is 641419. The next prime is 641437. The reversal of 641425 is 524146.

It can be written as a sum of positive squares in 3 ways, for example, as 14161 + 627264 = 119^2 + 792^2 .

It is a de Polignac number, because none of the positive numbers 2^k-641425 is a prime.

It is a super-2 number, since 2×641425² = 822852061250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641396 and 641405.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12804 + ... + 12853.

2⁶⁴¹⁴²⁵ is an apocalyptic number.

It is an amenable number.

641425 is a deficient number, since it is larger than the sum of its proper divisors (153973).

641425 is a wasteful number, since it uses less digits than its factorization.

641425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25667 (or 25662 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 641425 is about 800.8901297931. The cubic root of 641425 is about 86.2412999696.

The spelling of 641425 in words is "six hundred forty-one thousand, four hundred twenty-five".