641129 has 2 divisors, whose sum is σ = 641130. Its totient is φ = 641128.

The previous prime is 641101. The next prime is 641131. The reversal of 641129 is 921146.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565504 + 75625 = 752^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 641129 - 2⁸ = 640873 is a prime.

It is a super-2 number, since 2×641129² = 822092789282, which contains 22 as substring.

Together with 641131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320564 + 320565.

It is an arithmetic number, because the mean of its divisors is an integer number (320565).

2⁶⁴¹¹²⁹ is an apocalyptic number.

It is an amenable number.

641129 is a deficient number, since it is larger than the sum of its proper divisors (1).

641129 is an equidigital number, since it uses as much as digits as its factorization.

641129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 641129 is about 800.7053140825. The cubic root of 641129 is about 86.2280319323.

The spelling of 641129 in words is "six hundred forty-one thousand, one hundred twenty-nine".