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641255 = 5277463
BaseRepresentation
bin10011100100011100111
31012120122012
42130203213
5131010010
621424435
75310356
oct2344347
91176565
10641255
113a886a
1226b11b
13195b54
1412999d
15ca005
hex9c8e7

641255 has 8 divisors (see below), whose sum is σ = 773952. Its totient is φ = 510048.

The previous prime is 641239. The next prime is 641261. The reversal of 641255 is 552146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641255 - 24 = 641239 is a prime.

It is a super-2 number, since 2×6412552 = 822415950050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 641255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (96744).

2641255 is an apocalyptic number.

641255 is a deficient number, since it is larger than the sum of its proper divisors (132697).

641255 is a wasteful number, since it uses less digits than its factorization.

641255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

The product of its digits is 1200, while the sum is 23.

The square root of 641255 is about 800.7839908490. The cubic root of 641255 is about 86.2336803121.

Adding to 641255 its sum of digits (23), we get a triangular number (641278 = T1132).

The spelling of 641255 in words is "six hundred forty-one thousand, two hundred fifty-five".

Divisors: 1 5 277 463 1385 2315 128251 641255