421530413 has 2 divisors, whose sum is σ = 421530414. Its totient is φ = 421530412.

The previous prime is 421530401. The next prime is 421530463. The reversal of 421530413 is 314035124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399280324 + 22250089 = 19982^2 + 4717^2 .

It is a cyclic number.

It is not a de Polignac number, because 421530413 - 2¹⁶ = 421464877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421530463) 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, 210765206 + 210765207.

It is an arithmetic number, because the mean of its divisors is an integer number (210765207).

Almost surely, 2^421530413 is an apocalyptic number.

It is an amenable number.

421530413 is a deficient number, since it is larger than the sum of its proper divisors (1).

421530413 is an equidigital number, since it uses as much as digits as its factorization.

421530413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 421530413 is about 20531.2058340469. The cubic root of 421530413 is about 749.7957446744.

Adding to 421530413 its reverse (314035124), we get a palindrome (735565537).

The spelling of 421530413 in words is "four hundred twenty-one million, five hundred thirty thousand, four hundred thirteen".