4287961421 has 2 divisors, whose sum is σ = 4287961422. Its totient is φ = 4287961420.

The previous prime is 4287961399. The next prime is 4287961427. The reversal of 4287961421 is 1241697824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4278991396 + 8970025 = 65414^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 4287961421 - 2²⁶ = 4220852557 is a prime.

It is a super-2 number, since 2×4287961421² = 36773226295968678482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4287961427) 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, 2143980710 + 2143980711.

It is an arithmetic number, because the mean of its divisors is an integer number (2143980711).

Almost surely, 2^4287961421 is an apocalyptic number.

It is an amenable number.

4287961421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4287961421 is an equidigital number, since it uses as much as digits as its factorization.

4287961421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 4287961421 is about 65482.5276008799. The cubic root of 4287961421 is about 1624.6143679477.

The spelling of 4287961421 in words is "four billion, two hundred eighty-seven million, nine hundred sixty-one thousand, four hundred twenty-one".