641355 has 48 divisors (see below), whose sum is σ = 1264896. Its totient is φ = 274560.

The previous prime is 641327. The next prime is 641371. The reversal of 641355 is 553146.

641355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641355 - 2⁷ = 641227 is a prime.

It is a super-2 number, since 2×641355² = 822672472050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27874 + ... + 27896.

It is an arithmetic number, because the mean of its divisors is an integer number (26352).

2⁶⁴¹³⁵⁵ is an apocalyptic number.

641355 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

641355 is a deficient number, since it is larger than the sum of its proper divisors (623541).

641355 is a wasteful number, since it uses less digits than its factorization.

641355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 55 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 641355 is about 800.8464272256. The cubic root of 641355 is about 86.2381626267.

Subtracting from 641355 its reverse (553146), we obtain a square (88209 = 297²).

The spelling of 641355 in words is "six hundred forty-one thousand, three hundred fifty-five".