4287771421 has 2 divisors, whose sum is σ = 4287771422. Its totient is φ = 4287771420.

The previous prime is 4287771419. The next prime is 4287771457. The reversal of 4287771421 is 1241777824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4202928900 + 84842521 = 64830^2 + 9211^2 .

It is a cyclic number.

It is not a de Polignac number, because 4287771421 - 2¹ = 4287771419 is a prime.

Together with 4287771419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4287771461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2143885710 + 2143885711.

It is an arithmetic number, because the mean of its divisors is an integer number (2143885711).

Almost surely, 2^4287771421 is an apocalyptic number.

It is an amenable number.

4287771421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4287771421 is an equidigital number, since it uses as much as digits as its factorization.

4287771421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 175616, while the sum is 43.

The square root of 4287771421 is about 65481.0768161306. The cubic root of 4287771421 is about 1624.5903719849.

The spelling of 4287771421 in words is "four billion, two hundred eighty-seven million, seven hundred seventy-one thousand, four hundred twenty-one".