1217255 has 16 divisors (see below), whose sum is σ = 1604064. Its totient is φ = 881280.

The previous prime is 1217233. The next prime is 1217261. The reversal of 1217255 is 5527121.

It is a happy number.

It is not a de Polignac number, because 1217255 - 2⁶ = 1217191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217255.

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 15 ways as a sum of consecutive naturals, for example, 3812 + ... + 4118.

It is an arithmetic number, because the mean of its divisors is an integer number (100254).

2^1217255 is an apocalyptic number.

1217255 is a deficient number, since it is larger than the sum of its proper divisors (386809).

1217255 is a wasteful number, since it uses less digits than its factorization.

1217255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 700, while the sum is 23.

The square root of 1217255 is about 1103.2927988526. The cubic root of 1217255 is about 106.7727731051.

The spelling of 1217255 in words is "one million, two hundred seventeen thousand, two hundred fifty-five".