4221787 has 2 divisors, whose sum is σ = 4221788. Its totient is φ = 4221786.

The previous prime is 4221779. The next prime is 4221799. The reversal of 4221787 is 7871224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4221787 - 2³ = 4221779 is a prime.

It is equal to p₂₉₇₇₆₀ and since 4221787 and 297760 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (4225787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110893 + 2110894.

It is an arithmetic number, because the mean of its divisors is an integer number (2110894).

Almost surely, 2^4221787 is an apocalyptic number.

4221787 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221787 is an equidigital number, since it uses as much as digits as its factorization.

4221787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 4221787 is about 2054.6987613760. The cubic root of 4221787 is about 161.6213658929.

It can be divided in two parts, 422 and 1787, that added together give a square (2209 = 47²).

The spelling of 4221787 in words is "four million, two hundred twenty-one thousand, seven hundred eighty-seven".