641275 has 12 divisors (see below), whose sum is σ = 805752. Its totient is φ = 506240.

The previous prime is 641261. The next prime is 641279. The reversal of 641275 is 572146.

It is not a de Polignac number, because 641275 - 2¹⁷ = 510203 is a prime.

It is a super-2 number, since 2×641275² = 822467251250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641279) 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, 2712 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (67146).

2⁶⁴¹²⁷⁵ is an apocalyptic number.

641275 is a deficient number, since it is larger than the sum of its proper divisors (164477).

641275 is a wasteful number, since it uses less digits than its factorization.

641275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 345 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 641275 is about 800.7964785137. The cubic root of 641275 is about 86.2345768123.

641275 divided by its sum of digits (25) gives a triangular number (25651 = T₂₂₆).

The spelling of 641275 in words is "six hundred forty-one thousand, two hundred seventy-five".