65128141 has 4 divisors (see below), whose sum is σ = 70138012. Its totient is φ = 60118272.

The previous prime is 65128109. The next prime is 65128159. The reversal of 65128141 is 14182156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23474025 + 41654116 = 4845^2 + 6454^2 .

It is a cyclic number.

It is not a de Polignac number, because 65128141 - 2⁵ = 65128109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65128741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504916 + ... + 2504941.

It is an arithmetic number, because the mean of its divisors is an integer number (17534503).

Almost surely, 2^65128141 is an apocalyptic number.

It is an amenable number.

65128141 is a deficient number, since it is larger than the sum of its proper divisors (5009871).

65128141 is a wasteful number, since it uses less digits than its factorization.

65128141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009870.

The product of its digits is 1920, while the sum is 28.

The square root of 65128141 is about 8070.2008029540. The cubic root of 65128141 is about 402.3366177162.

The spelling of 65128141 in words is "sixty-five million, one hundred twenty-eight thousand, one hundred forty-one".