421607 has 2 divisors, whose sum is σ = 421608. Its totient is φ = 421606.

The previous prime is 421559. The next prime is 421609. The reversal of 421607 is 706124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421607 - 2¹² = 417511 is a prime.

Together with 421609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210803 + 210804.

It is an arithmetic number, because the mean of its divisors is an integer number (210804).

2⁴²¹⁶⁰⁷ is an apocalyptic number.

421607 is a deficient number, since it is larger than the sum of its proper divisors (1).

421607 is an equidigital number, since it uses as much as digits as its factorization.

421607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 421607 is about 649.3127135672. The cubic root of 421607 is about 74.9841151544.

The spelling of 421607 in words is "four hundred twenty-one thousand, six hundred seven".