1285655 has 16 divisors (see below), whose sum is σ = 1784640. Its totient is φ = 870912.

The previous prime is 1285649. The next prime is 1285679. The reversal of 1285655 is 5565821.

It is not a de Polignac number, because 1285655 - 2¹⁰ = 1284631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3647 + ... + 3983.

It is an arithmetic number, because the mean of its divisors is an integer number (111540).

2^1285655 is an apocalyptic number.

1285655 is a deficient number, since it is larger than the sum of its proper divisors (498985).

1285655 is a wasteful number, since it uses less digits than its factorization.

1285655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

The product of its digits is 12000, while the sum is 32.

The square root of 1285655 is about 1133.8672761836. The cubic root of 1285655 is about 108.7363659307.

The spelling of 1285655 in words is "one million, two hundred eighty-five thousand, six hundred fifty-five".