421056107 has 2 divisors, whose sum is σ = 421056108. Its totient is φ = 421056106.

The previous prime is 421056091. The next prime is 421056109. The reversal of 421056107 is 701650124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421056107 - 2⁴ = 421056091 is a prime.

Together with 421056109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421056109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210528053 + 210528054.

It is an arithmetic number, because the mean of its divisors is an integer number (210528054).

Almost surely, 2^421056107 is an apocalyptic number.

421056107 is a deficient number, since it is larger than the sum of its proper divisors (1).

421056107 is an equidigital number, since it uses as much as digits as its factorization.

421056107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 421056107 is about 20519.6517270640. The cubic root of 421056107 is about 749.5144157525.

The spelling of 421056107 in words is "four hundred twenty-one million, fifty-six thousand, one hundred seven".