641051 has 2 divisors, whose sum is σ = 641052. Its totient is φ = 641050.

The previous prime is 640993. The next prime is 641057. The reversal of 641051 is 150146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641051 - 2¹⁰ = 640027 is a prime.

It is not a weakly prime, because it can be changed into another prime (641057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320525 + 320526.

It is an arithmetic number, because the mean of its divisors is an integer number (320526).

2⁶⁴¹⁰⁵¹ is an apocalyptic number.

641051 is a deficient number, since it is larger than the sum of its proper divisors (1).

641051 is an equidigital number, since it uses as much as digits as its factorization.

641051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 641051 is about 800.6566055432. The cubic root of 641051 is about 86.2245349453.

Adding to 641051 its reverse (150146), we get a palindrome (791197).

The spelling of 641051 in words is "six hundred forty-one thousand, fifty-one".