641045 has 8 divisors (see below), whose sum is σ = 795960. Its totient is φ = 495040.

The previous prime is 640993. The next prime is 641051. The reversal of 641045 is 540146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 485809 = 394^2 + 697^2 .

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

It is not a de Polignac number, because 641045 - 2¹⁸ = 378901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066 + ... + 2355.

It is an arithmetic number, because the mean of its divisors is an integer number (99495).

2⁶⁴¹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

641045 is a deficient number, since it is larger than the sum of its proper divisors (154915).

641045 is a wasteful number, since it uses less digits than its factorization.

641045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 641045 is about 800.6528586098. The cubic root of 641045 is about 86.2242659346.

The spelling of 641045 in words is "six hundred forty-one thousand, forty-five".