641235 has 32 divisors (see below), whose sum is σ = 1216512. Its totient is φ = 282240.

The previous prime is 641227. The next prime is 641239. The reversal of 641235 is 532146.

It is a happy number.

641235 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 641235 - 2³ = 641227 is a prime.

It is a super-2 number, since 2×641235² = 822364650450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3157 + ... + 3353.

It is an arithmetic number, because the mean of its divisors is an integer number (38016).

2⁶⁴¹²³⁵ is an apocalyptic number.

641235 is a deficient number, since it is larger than the sum of its proper divisors (575277).

641235 is a wasteful number, since it uses less digits than its factorization.

641235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its digits is 720, while the sum is 21.

The square root of 641235 is about 800.7715029895. The cubic root of 641235 is about 86.2327837933.

The spelling of 641235 in words is "six hundred forty-one thousand, two hundred thirty-five".