1218225 has 24 divisors (see below), whose sum is σ = 2073280. Its totient is φ = 630720.

The previous prime is 1218221. The next prime is 1218247. The reversal of 1218225 is 5228121.

It is a happy number.

It is not a de Polignac number, because 1218225 - 2² = 1218221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2556 + ... + 2994.

2^1218225 is an apocalyptic number.

1218225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1218225 is a deficient number, since it is larger than the sum of its proper divisors (855055).

1218225 is a wasteful number, since it uses less digits than its factorization.

1218225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 484 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 1218225 is about 1103.7323045014. The cubic root of 1218225 is about 106.8011270905.

The spelling of 1218225 in words is "one million, two hundred eighteen thousand, two hundred twenty-five".