641057 has 2 divisors, whose sum is σ = 641058. Its totient is φ = 641056.

The previous prime is 641051. The next prime is 641077. The reversal of 641057 is 750146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625681 + 15376 = 791^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 641057 - 2⁶ = 640993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641051) 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 as a sum of consecutive naturals, namely, 320528 + 320529.

It is an arithmetic number, because the mean of its divisors is an integer number (320529).

2⁶⁴¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

641057 is a deficient number, since it is larger than the sum of its proper divisors (1).

641057 is an equidigital number, since it uses as much as digits as its factorization.

641057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 641057 is about 800.6603524591. The cubic root of 641057 is about 86.2248039544.

The spelling of 641057 in words is "six hundred forty-one thousand, fifty-seven".