65283121 has 4 divisors (see below), whose sum is σ = 66514932. Its totient is φ = 64051312.

The previous prime is 65283109. The next prime is 65283149. The reversal of 65283121 is 12138256.

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 43296400 + 21986721 = 6580^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 65283121 - 2¹³ = 65274929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65283121.

It is not an unprimeable number, because it can be changed into a prime (65283721) 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, 615826 + ... + 615931.

It is an arithmetic number, because the mean of its divisors is an integer number (16628733).

Almost surely, 2^65283121 is an apocalyptic number.

It is an amenable number.

65283121 is a deficient number, since it is larger than the sum of its proper divisors (1231811).

65283121 is a wasteful number, since it uses less digits than its factorization.

65283121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231810.

The product of its digits is 2880, while the sum is 28.

The square root of 65283121 is about 8079.7970890363. The cubic root of 65283121 is about 402.6555005304.

The spelling of 65283121 in words is "sixty-five million, two hundred eighty-three thousand, one hundred twenty-one".