1285005 has 8 divisors (see below), whose sum is σ = 2056032. Its totient is φ = 685328.

The previous prime is 1284991. The next prime is 1285021. The reversal of 1285005 is 5005821.

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 1285005 - 2¹⁰ = 1283981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42819 + ... + 42848.

It is an arithmetic number, because the mean of its divisors is an integer number (257004).

2^1285005 is an apocalyptic number.

1285005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285005 is a deficient number, since it is larger than the sum of its proper divisors (771027).

1285005 is an equidigital number, since it uses as much as digits as its factorization.

1285005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85675.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1285005 is about 1133.5806102788. The cubic root of 1285005 is about 108.7180379053.

The spelling of 1285005 in words is "one million, two hundred eighty-five thousand, five".