1291255 has 16 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 872352.

The previous prime is 1291249. The next prime is 1291271. The reversal of 1291255 is 5521921.

It is a cyclic number.

It is not a de Polignac number, because 1291255 - 2⁵ = 1291223 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, 2532 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1291255 is an apocalyptic number.

1291255 is a deficient number, since it is larger than the sum of its proper divisors (505865).

1291255 is an equidigital number, since it uses as much as digits as its factorization.

1291255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its digits is 900, while the sum is 25.

The square root of 1291255 is about 1136.3340177958. The cubic root of 1291255 is about 108.8940136342.

The spelling of 1291255 in words is "one million, two hundred ninety-one thousand, two hundred fifty-five".