641106 has 12 divisors (see below), whose sum is σ = 1389102. Its totient is φ = 213696.

The previous prime is 641101. The next prime is 641129. The reversal of 641106 is 601146.

It can be written as a sum of positive squares in only one way, i.e., 576081 + 65025 = 759^2 + 255^2 .

It is a super-2 number, since 2×641106² = 822033806472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 35617 = 641106 / (6 + 4 + 1 + 1 + 0 + 6).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641101) by changing a digit.

641106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17791 + ... + 17826.

2⁶⁴¹¹⁰⁶ is an apocalyptic number.

641106 is an abundant number, since it is smaller than the sum of its proper divisors (747996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641106 is a wasteful number, since it uses less digits than its factorization.

641106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35625 (or 35622 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 641106 is about 800.6909516162. The cubic root of 641106 is about 86.2270007990.

It can be divided in two parts, 641 and 106, that added together give a palindrome (747).

The spelling of 641106 in words is "six hundred forty-one thousand, one hundred six".