641043 has 12 divisors (see below), whose sum is σ = 997360. Its totient is φ = 394416.

The previous prime is 640993. The next prime is 641051. The reversal of 641043 is 340146.

It is not a de Polignac number, because 641043 - 2⁹ = 640531 is a prime.

It is a super-2 number, since 2×641043² = 821872255698, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (641083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2623 + ... + 2856.

2⁶⁴¹⁰⁴³ is an apocalyptic number.

641043 is a deficient number, since it is larger than the sum of its proper divisors (356317).

641043 is a wasteful number, since it uses less digits than its factorization.

641043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498 (or 5495 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 641043 is about 800.6516096281. The cubic root of 641043 is about 86.2241762640.

Adding to 641043 its reverse (340146), we get a palindrome (981189).

The spelling of 641043 in words is "six hundred forty-one thousand, forty-three".