1221282 has 24 divisors (see below), whose sum is σ = 2786160. Its totient is φ = 385560.

The previous prime is 1221251. The next prime is 1221289. The reversal of 1221282 is 2821221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1221289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1444 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (116090).

2^1221282 is an apocalyptic number.

1221282 is an abundant number, since it is smaller than the sum of its proper divisors (1564878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221282 is a wasteful number, since it uses less digits than its factorization.

1221282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3595 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1221282 is about 1105.1162834743. The cubic root of 1221282 is about 106.8903876480.

The spelling of 1221282 in words is "one million, two hundred twenty-one thousand, two hundred eighty-two".