641745141 has 4 divisors (see below), whose sum is σ = 855660192. Its totient is φ = 427830092.

The previous prime is 641745119. The next prime is 641745151. The reversal of 641745141 is 141547146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641745141 - 2⁵ = 641745109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641745101) 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 in 3 ways as a sum of consecutive naturals, for example, 106957521 + ... + 106957526.

It is an arithmetic number, because the mean of its divisors is an integer number (213915048).

Almost surely, 2^641745141 is an apocalyptic number.

It is an amenable number.

641745141 is a deficient number, since it is larger than the sum of its proper divisors (213915051).

641745141 is a wasteful number, since it uses less digits than its factorization.

641745141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213915050.

The product of its digits is 13440, while the sum is 33.

The square root of 641745141 is about 25332.6891782140. The cubic root of 641745141 is about 862.5564551998.

The spelling of 641745141 in words is "six hundred forty-one million, seven hundred forty-five thousand, one hundred forty-one".