4368521 has 2 divisors, whose sum is σ = 4368522. Its totient is φ = 4368520.

The previous prime is 4368503. The next prime is 4368523. The reversal of 4368521 is 1258634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3857296 + 511225 = 1964^2 + 715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4368521 is a prime.

Together with 4368523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4368523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2184260 + 2184261.

It is an arithmetic number, because the mean of its divisors is an integer number (2184261).

Almost surely, 2^4368521 is an apocalyptic number.

It is an amenable number.

4368521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4368521 is an equidigital number, since it uses as much as digits as its factorization.

4368521 is an evil number, because the sum of its binary digits is even.

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

The square root of 4368521 is about 2090.1007152767. The cubic root of 4368521 is about 163.4725394750.

The spelling of 4368521 in words is "four million, three hundred sixty-eight thousand, five hundred twenty-one".