4221407 has 2 divisors, whose sum is σ = 4221408. Its totient is φ = 4221406.

The previous prime is 4221379. The next prime is 4221409. The reversal of 4221407 is 7041224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4221407 - 2²⁰ = 3172831 is a prime.

Together with 4221409, 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 (4221409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110703 + 2110704.

It is an arithmetic number, because the mean of its divisors is an integer number (2110704).

Almost surely, 2^4221407 is an apocalyptic number.

4221407 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221407 is an equidigital number, since it uses as much as digits as its factorization.

4221407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 4221407 is about 2054.6062883190. The cubic root of 4221407 is about 161.6165166066.

The spelling of 4221407 in words is "four million, two hundred twenty-one thousand, four hundred seven".