1217285 has 8 divisors (see below), whose sum is σ = 1546776. Its totient is φ = 916480.

The previous prime is 1217269. The next prime is 1217297. The reversal of 1217285 is 5827121.

It can be written as a sum of positive squares in 4 ways, for example, as 20449 + 1196836 = 143^2 + 1094^2 .

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

It is not a de Polignac number, because 1217285 - 2⁴ = 1217269 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, 7076 + ... + 7245.

It is an arithmetic number, because the mean of its divisors is an integer number (193347).

2^1217285 is an apocalyptic number.

It is an amenable number.

1217285 is a deficient number, since it is larger than the sum of its proper divisors (329491).

1217285 is a wasteful number, since it uses less digits than its factorization.

1217285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14343.

The product of its digits is 1120, while the sum is 26.

The square root of 1217285 is about 1103.3063944345. The cubic root of 1217285 is about 106.7736502582.

The spelling of 1217285 in words is "one million, two hundred seventeen thousand, two hundred eighty-five".