641029 has 4 divisors (see below), whose sum is σ = 647020. Its totient is φ = 635040.

The previous prime is 640993. The next prime is 641051. The reversal of 641029 is 920146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920146 = 2 ⋅460073.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 148225 = 702^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 641029 - 2⁷ = 640901 is a prime.

It is a Duffinian number.

641029 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2832 + ... + 3049.

It is an arithmetic number, because the mean of its divisors is an integer number (161755).

2⁶⁴¹⁰²⁹ is an apocalyptic number.

It is an amenable number.

641029 is a deficient number, since it is larger than the sum of its proper divisors (5991).

641029 is a wasteful number, since it uses less digits than its factorization.

641029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 641029 is about 800.6428667015. The cubic root of 641029 is about 86.2235485644.

It can be divided in two parts, 64 and 1029, that multiplied together give a palindrome (65856).

The spelling of 641029 in words is "six hundred forty-one thousand, twenty-nine".