802710421 has 2 divisors, whose sum is σ = 802710422. Its totient is φ = 802710420.

The previous prime is 802710371. The next prime is 802710427. The reversal of 802710421 is 124017208.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555780625 + 246929796 = 23575^2 + 15714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802710421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802710427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401355210 + 401355211.

It is an arithmetic number, because the mean of its divisors is an integer number (401355211).

Almost surely, 2^802710421 is an apocalyptic number.

It is an amenable number.

802710421 is a deficient number, since it is larger than the sum of its proper divisors (1).

802710421 is an equidigital number, since it uses as much as digits as its factorization.

802710421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 802710421 is about 28332.1446593794. The cubic root of 802710421 is about 929.3649732777.

Adding to 802710421 its reverse (124017208), we get a palindrome (926727629).

The spelling of 802710421 in words is "eight hundred two million, seven hundred ten thousand, four hundred twenty-one".