1285555 has 8 divisors (see below), whose sum is σ = 1580544. Its totient is φ = 1003200.

The previous prime is 1285553. The next prime is 1285607. The reversal of 1285555 is 5555821.

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

It is not a de Polignac number, because 1285555 - 2¹ = 1285553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2931 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (197568).

2^1285555 is an apocalyptic number.

1285555 is a deficient number, since it is larger than the sum of its proper divisors (294989).

1285555 is an equidigital number, since it uses as much as digits as its factorization.

1285555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6317.

The product of its digits is 10000, while the sum is 31.

The square root of 1285555 is about 1133.8231784542. The cubic root of 1285555 is about 108.7335466366.

The spelling of 1285555 in words is "one million, two hundred eighty-five thousand, five hundred fifty-five".