827405 has 8 divisors (see below), whose sum is σ = 1001472. Its totient is φ = 656208.

The previous prime is 827389. The next prime is 827417. The reversal of 827405 is 504728.

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 827405 - 2⁴ = 827389 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 827405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (125184).

2⁸²⁷⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

827405 is a deficient number, since it is larger than the sum of its proper divisors (174067).

827405 is a wasteful number, since it uses less digits than its factorization.

827405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 827405 is about 909.6180517118. The cubic root of 827405 is about 93.8799206110.

The spelling of 827405 in words is "eight hundred twenty-seven thousand, four hundred five".