825270421 has 2 divisors, whose sum is σ = 825270422. Its totient is φ = 825270420.

The previous prime is 825270359. The next prime is 825270443. The reversal of 825270421 is 124072528.

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., 769230225 + 56040196 = 27735^2 + 7486^2 .

It is a cyclic number.

It is not a de Polignac number, because 825270421 - 2⁹ = 825269909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825270451) 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, 412635210 + 412635211.

It is an arithmetic number, because the mean of its divisors is an integer number (412635211).

Almost surely, 2^825270421 is an apocalyptic number.

It is an amenable number.

825270421 is a deficient number, since it is larger than the sum of its proper divisors (1).

825270421 is an equidigital number, since it uses as much as digits as its factorization.

825270421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 825270421 is about 28727.5202723799. The cubic root of 825270421 is about 937.9911911588.

The spelling of 825270421 in words is "eight hundred twenty-five million, two hundred seventy thousand, four hundred twenty-one".