1288255 has 8 divisors (see below), whose sum is σ = 1561824. Its totient is φ = 1020000.

The previous prime is 1288249. The next prime is 1288291. The reversal of 1288255 is 5528821.

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

It is not a de Polignac number, because 1288255 - 2³ = 1288247 is a prime.

It is a Duffinian 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, 771 + ... + 1780.

It is an arithmetic number, because the mean of its divisors is an integer number (195228).

2^1288255 is an apocalyptic number.

1288255 is a deficient number, since it is larger than the sum of its proper divisors (273569).

1288255 is a wasteful number, since it uses less digits than its factorization.

1288255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its digits is 6400, while the sum is 31.

The square root of 1288255 is about 1135.0132157821. The cubic root of 1288255 is about 108.8096163195.

The spelling of 1288255 in words is "one million, two hundred eighty-eight thousand, two hundred fifty-five".