16252321 has 2 divisors, whose sum is σ = 16252322. Its totient is φ = 16252320.

The previous prime is 16252307. The next prime is 16252333. The reversal of 16252321 is 12325261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 3111696 = 3625^2 + 1764^2 .

It is a cyclic number.

It is not a de Polignac number, because 16252321 - 2⁷ = 16252193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16252292 and 16252301.

It is not a weakly prime, because it can be changed into another prime (16202321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8126160 + 8126161.

It is an arithmetic number, because the mean of its divisors is an integer number (8126161).

Almost surely, 2^16252321 is an apocalyptic number.

It is an amenable number.

16252321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16252321 is an equidigital number, since it uses as much as digits as its factorization.

16252321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 16252321 is about 4031.4167484893. The cubic root of 16252321 is about 253.3019095757.

Adding to 16252321 its reverse (12325261), we get a palindrome (28577582).

The spelling of 16252321 in words is "sixteen million, two hundred fifty-two thousand, three hundred twenty-one".