641071253 has 2 divisors, whose sum is σ = 641071254. Its totient is φ = 641071252.

The previous prime is 641071243. The next prime is 641071331. The reversal of 641071253 is 352170146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466646404 + 174424849 = 21602^2 + 13207^2 .

It is a cyclic number.

It is not a de Polignac number, because 641071253 - 2⁴ = 641071237 is a prime.

It is a super-3 number, since 3×641071253³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641071243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320535626 + 320535627.

It is an arithmetic number, because the mean of its divisors is an integer number (320535627).

Almost surely, 2^641071253 is an apocalyptic number.

It is an amenable number.

641071253 is a deficient number, since it is larger than the sum of its proper divisors (1).

641071253 is an equidigital number, since it uses as much as digits as its factorization.

641071253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 641071253 is about 25319.3849253887. The cubic root of 641071253 is about 862.2544297871.

The spelling of 641071253 in words is "six hundred forty-one million, seventy-one thousand, two hundred fifty-three".