102420413 has 2 divisors, whose sum is σ = 102420414. Its totient is φ = 102420412.

The previous prime is 102420407. The next prime is 102420443. The reversal of 102420413 is 314024201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96864964 + 5555449 = 9842^2 + 2357^2 .

It is an emirp because it is prime and its reverse (314024201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102420413 - 2⁶ = 102420349 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102420391 and 102420400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102420443) 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, 51210206 + 51210207.

It is an arithmetic number, because the mean of its divisors is an integer number (51210207).

Almost surely, 2^102420413 is an apocalyptic number.

It is an amenable number.

102420413 is a deficient number, since it is larger than the sum of its proper divisors (1).

102420413 is an equidigital number, since it uses as much as digits as its factorization.

102420413 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 102420413 is about 10120.2970806197. The cubic root of 102420413 is about 467.8739235351.

Adding to 102420413 its reverse (314024201), we get a palindrome (416444614).

The spelling of 102420413 in words is "one hundred two million, four hundred twenty thousand, four hundred thirteen".