641453 has 2 divisors, whose sum is σ = 641454. Its totient is φ = 641452.

The previous prime is 641441. The next prime is 641467. The reversal of 641453 is 354146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 29929 = 782^2 + 173^2 .

It is a cyclic number.

It is not a de Polignac number, because 641453 - 2⁴ = 641437 is a prime.

It is a super-2 number, since 2×641453² = 822923902418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320726 + 320727.

It is an arithmetic number, because the mean of its divisors is an integer number (320727).

2⁶⁴¹⁴⁵³ is an apocalyptic number.

It is an amenable number.

641453 is a deficient number, since it is larger than the sum of its proper divisors (1).

641453 is an equidigital number, since it uses as much as digits as its factorization.

641453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 641453 is about 800.9076101524. The cubic root of 641453 is about 86.2425548429.

Adding to 641453 its reverse (354146), we get a palindrome (995599).

The spelling of 641453 in words is "six hundred forty-one thousand, four hundred fifty-three".