102304421 has 2 divisors, whose sum is σ = 102304422. Its totient is φ = 102304420.

The previous prime is 102304399. The next prime is 102304429. The reversal of 102304421 is 124403201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 25391521 = 8770^2 + 5039^2 .

It is a cyclic number.

It is not a de Polignac number, because 102304421 - 2²⁶ = 35195557 is a prime.

It is a super-2 number, since 2×102304421² = 20932389112290482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102304421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102304429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51152210 + 51152211.

It is an arithmetic number, because the mean of its divisors is an integer number (51152211).

Almost surely, 2^102304421 is an apocalyptic number.

It is an amenable number.

102304421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102304421 is an equidigital number, since it uses as much as digits as its factorization.

102304421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 102304421 is about 10114.5647953829. The cubic root of 102304421 is about 467.6972330675.

Adding to 102304421 its reverse (124403201), we get a palindrome (226707622).

The spelling of 102304421 in words is "one hundred two million, three hundred four thousand, four hundred twenty-one".