641571127 has 2 divisors, whose sum is σ = 641571128. Its totient is φ = 641571126.

The previous prime is 641571113. The next prime is 641571149. The reversal of 641571127 is 721175146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641571127 - 2⁷ = 641570999 is a prime.

It is a super-2 number, since 2×641571127² = 823227022000100258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641571092 and 641571101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641571167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320785563 + 320785564.

It is an arithmetic number, because the mean of its divisors is an integer number (320785564).

Almost surely, 2^641571127 is an apocalyptic number.

641571127 is a deficient number, since it is larger than the sum of its proper divisors (1).

641571127 is an equidigital number, since it uses as much as digits as its factorization.

641571127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 641571127 is about 25329.2543711812. The cubic root of 641571127 is about 862.4784852716.

The spelling of 641571127 in words is "six hundred forty-one million, five hundred seventy-one thousand, one hundred twenty-seven".