8760421 has 2 divisors, whose sum is σ = 8760422. Its totient is φ = 8760420.

The previous prime is 8760419. The next prime is 8760449. The reversal of 8760421 is 1240678.

It is an a-pointer prime, because the next prime (8760449) can be obtained adding 8760421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 408321 = 2890^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 8760421 - 2¹ = 8760419 is a prime.

Together with 8760419, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8760421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8760461) 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, 4380210 + 4380211.

It is an arithmetic number, because the mean of its divisors is an integer number (4380211).

Almost surely, 2^8760421 is an apocalyptic number.

It is an amenable number.

8760421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8760421 is an equidigital number, since it uses as much as digits as its factorization.

8760421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8760421 is about 2959.8008378943. The cubic root of 8760421 is about 206.1460380866.

The spelling of 8760421 in words is "eight million, seven hundred sixty thousand, four hundred twenty-one".