852136421 has 2 divisors, whose sum is σ = 852136422. Its totient is φ = 852136420.

The previous prime is 852136409. The next prime is 852136427. The reversal of 852136421 is 124631258.

852136421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802588900 + 49547521 = 28330^2 + 7039^2 .

It is a cyclic number.

It is not a de Polignac number, because 852136421 - 2¹⁸ = 851874277 is a prime.

It is a super-2 number, since 2×852136421² = 1452272959989378482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852136427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426068210 + 426068211.

It is an arithmetic number, because the mean of its divisors is an integer number (426068211).

Almost surely, 2^852136421 is an apocalyptic number.

It is an amenable number.

852136421 is a deficient number, since it is larger than the sum of its proper divisors (1).

852136421 is an equidigital number, since it uses as much as digits as its factorization.

852136421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 852136421 is about 29191.3757983415. The cubic root of 852136421 is about 948.0612060425.

Adding to 852136421 its reverse (124631258), we get a palindrome (976767679).

The spelling of 852136421 in words is "eight hundred fifty-two million, one hundred thirty-six thousand, four hundred twenty-one".