827426521 has 8 divisors (see below), whose sum is σ = 863814600. Its totient is φ = 791562240.

The previous prime is 827426519. The next prime is 827426527. The reversal of 827426521 is 125624728.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41409225 + 786017296 = 6435^2 + 28036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 827426521 - 2¹ = 827426519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827426527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127720 + ... + 134041.

It is an arithmetic number, because the mean of its divisors is an integer number (107976825).

Almost surely, 2^827426521 is an apocalyptic number.

It is an amenable number.

827426521 is a deficient number, since it is larger than the sum of its proper divisors (36388079).

827426521 is a wasteful number, since it uses less digits than its factorization.

827426521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261899.

The product of its digits is 53760, while the sum is 37.

The square root of 827426521 is about 28765.0225273682. The cubic root of 827426521 is about 938.8073455027.

The spelling of 827426521 in words is "eight hundred twenty-seven million, four hundred twenty-six thousand, five hundred twenty-one".