641241253 has 2 divisors, whose sum is σ = 641241254. Its totient is φ = 641241252.

The previous prime is 641241233. The next prime is 641241277. The reversal of 641241253 is 352142146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328588129 + 312653124 = 18127^2 + 17682^2 .

It is a cyclic number.

It is not a de Polignac number, because 641241253 - 2⁵ = 641241221 is a prime.

It is a super-2 number, since 2×641241253² = 822380689098020018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641241233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320620626 + 320620627.

It is an arithmetic number, because the mean of its divisors is an integer number (320620627).

Almost surely, 2^641241253 is an apocalyptic number.

It is an amenable number.

641241253 is a deficient number, since it is larger than the sum of its proper divisors (1).

641241253 is an equidigital number, since it uses as much as digits as its factorization.

641241253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

The square root of 641241253 is about 25322.7418144244. The cubic root of 641241253 is about 862.3306409192.

Adding to 641241253 its reverse (352142146), we get a palindrome (993383399).

The spelling of 641241253 in words is "six hundred forty-one million, two hundred forty-one thousand, two hundred fifty-three".