8707421 has 2 divisors, whose sum is σ = 8707422. Its totient is φ = 8707420.

The previous prime is 8707393. The next prime is 8707429. The reversal of 8707421 is 1247078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5244100 + 3463321 = 2290^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 8707421 - 2⁶ = 8707357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8707429) 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, 4353710 + 4353711.

It is an arithmetic number, because the mean of its divisors is an integer number (4353711).

Almost surely, 2^8707421 is an apocalyptic number.

It is an amenable number.

8707421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8707421 is an equidigital number, since it uses as much as digits as its factorization.

8707421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 8707421 is about 2950.8339499199. The cubic root of 8707421 is about 205.7294733376.

The spelling of 8707421 in words is "eight million, seven hundred seven thousand, four hundred twenty-one".