4061221265 has 4 divisors (see below), whose sum is σ = 4873465524. Its totient is φ = 3248977008.

The previous prime is 4061221249. The next prime is 4061221267. The reversal of 4061221265 is 5621221604.

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 1150295056 + 2910926209 = 33916^2 + 53953^2 .

It is a cyclic number.

It is not a de Polignac number, because 4061221265 - 2⁴ = 4061221249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4061221267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406122122 + ... + 406122131.

It is an arithmetic number, because the mean of its divisors is an integer number (1218366381).

Almost surely, 2^4061221265 is an apocalyptic number.

It is an amenable number.

4061221265 is a deficient number, since it is larger than the sum of its proper divisors (812244259).

4061221265 is an equidigital number, since it uses as much as digits as its factorization.

4061221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812244258.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 4061221265 is about 63727.7119077721. The cubic root of 4061221265 is about 1595.4586411128.

Adding to 4061221265 its reverse (5621221604), we get a palindrome (9682442869).

The spelling of 4061221265 in words is "four billion, sixty-one million, two hundred twenty-one thousand, two hundred sixty-five".