4005260321 has 2 divisors, whose sum is σ = 4005260322. Its totient is φ = 4005260320.

The previous prime is 4005260317. The next prime is 4005260351. The reversal of 4005260321 is 1230625004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2810590225 + 1194670096 = 53015^2 + 34564^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005260321 - 2² = 4005260317 is a prime.

It is a super-2 number, since 2×4005260321² = 32084220477954046082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4005260351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002630160 + 2002630161.

It is an arithmetic number, because the mean of its divisors is an integer number (2002630161).

Almost surely, 2^4005260321 is an apocalyptic number.

It is an amenable number.

4005260321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005260321 is an equidigital number, since it uses as much as digits as its factorization.

4005260321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 4005260321 is about 63287.1260289168. The cubic root of 4005260321 is about 1588.0966004140.

Adding to 4005260321 its reverse (1230625004), we get a palindrome (5235885325).

The spelling of 4005260321 in words is "four billion, five million, two hundred sixty thousand, three hundred twenty-one".