641642127 has 16 divisors (see below), whose sum is σ = 984307200. Its totient is φ = 364190112.

The previous prime is 641642117. The next prime is 641642149. The reversal of 641642127 is 721246146.

It is not a de Polignac number, because 641642127 - 2¹¹ = 641640079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641642117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99403 + ... + 105660.

It is an arithmetic number, because the mean of its divisors is an integer number (61519200).

Almost surely, 2^641642127 is an apocalyptic number.

641642127 is a deficient number, since it is larger than the sum of its proper divisors (342665073).

641642127 is a wasteful number, since it uses less digits than its factorization.

641642127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205222.

The product of its digits is 16128, while the sum is 33.

The square root of 641642127 is about 25330.6558738616. The cubic root of 641642127 is about 862.5102997300.

The spelling of 641642127 in words is "six hundred forty-one million, six hundred forty-two thousand, one hundred twenty-seven".