4288321 has 2 divisors, whose sum is σ = 4288322. Its totient is φ = 4288320.

The previous prime is 4288309. The next prime is 4288391. The reversal of 4288321 is 1238824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 540225 = 1936^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 4288321 - 2⁹ = 4287809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4288321.

It is not a weakly prime, because it can be changed into another prime (4288391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144160 + 2144161.

It is an arithmetic number, because the mean of its divisors is an integer number (2144161).

Almost surely, 2^4288321 is an apocalyptic number.

It is an amenable number.

4288321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4288321 is an equidigital number, since it uses as much as digits as its factorization.

4288321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 4288321 is about 2070.8261636361. The cubic root of 4288321 is about 162.4659778873.

The spelling of 4288321 in words is "four million, two hundred eighty-eight thousand, three hundred twenty-one".