852786421 has 2 divisors, whose sum is σ = 852786422. Its totient is φ = 852786420.

The previous prime is 852786401. The next prime is 852786437. The reversal of 852786421 is 124687258.

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., 847450321 + 5336100 = 29111^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 852786421 - 2⁷ = 852786293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852786401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426393210 + 426393211.

It is an arithmetic number, because the mean of its divisors is an integer number (426393211).

Almost surely, 2^852786421 is an apocalyptic number.

It is an amenable number.

852786421 is a deficient number, since it is larger than the sum of its proper divisors (1).

852786421 is an equidigital number, since it uses as much as digits as its factorization.

852786421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 852786421 is about 29202.5071012747. The cubic root of 852786421 is about 948.3022015561.

The spelling of 852786421 in words is "eight hundred fifty-two million, seven hundred eighty-six thousand, four hundred twenty-one".