421766101 has 2 divisors, whose sum is σ = 421766102. Its totient is φ = 421766100.

The previous prime is 421766099. The next prime is 421766153. The reversal of 421766101 is 101667124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415140625 + 6625476 = 20375^2 + 2574^2 .

It is a cyclic number.

It is not a de Polignac number, because 421766101 - 2¹ = 421766099 is a prime.

Together with 421766099, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 421766101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421761101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210883050 + 210883051.

It is an arithmetic number, because the mean of its divisors is an integer number (210883051).

Almost surely, 2^421766101 is an apocalyptic number.

It is an amenable number.

421766101 is a deficient number, since it is larger than the sum of its proper divisors (1).

421766101 is an equidigital number, since it uses as much as digits as its factorization.

421766101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 421766101 is about 20536.9447825133. The cubic root of 421766101 is about 749.9354617058.

The spelling of 421766101 in words is "four hundred twenty-one million, seven hundred sixty-six thousand, one hundred one".