421406413 has 2 divisors, whose sum is σ = 421406414. Its totient is φ = 421406412.

The previous prime is 421406389. The next prime is 421406417. The reversal of 421406413 is 314604124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359595369 + 61811044 = 18963^2 + 7862^2 .

It is a cyclic number.

It is not a de Polignac number, because 421406413 - 2¹⁷ = 421275341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421406417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210703206 + 210703207.

It is an arithmetic number, because the mean of its divisors is an integer number (210703207).

Almost surely, 2^421406413 is an apocalyptic number.

It is an amenable number.

421406413 is a deficient number, since it is larger than the sum of its proper divisors (1).

421406413 is an equidigital number, since it uses as much as digits as its factorization.

421406413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 421406413 is about 20528.1858185277. The cubic root of 421406413 is about 749.7222159422.

The spelling of 421406413 in words is "four hundred twenty-one million, four hundred six thousand, four hundred thirteen".