1286255 has 8 divisors (see below), whose sum is σ = 1553472. Its totient is φ = 1022368.

The previous prime is 1286239. The next prime is 1286261. The reversal of 1286255 is 5526821.

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 1286255 - 2⁴ = 1286239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (194184).

2^1286255 is an apocalyptic number.

1286255 is a deficient number, since it is larger than the sum of its proper divisors (267217).

1286255 is a wasteful number, since it uses less digits than its factorization.

1286255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665.

The product of its digits is 4800, while the sum is 29.

The square root of 1286255 is about 1134.1318265528. The cubic root of 1286255 is about 108.7532786258.

The spelling of 1286255 in words is "one million, two hundred eighty-six thousand, two hundred fifty-five".