1221283 has 4 divisors (see below), whose sum is σ = 1395760. Its totient is φ = 1046808.

The previous prime is 1221251. The next prime is 1221289. The reversal of 1221283 is 3821221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1221283 - 2⁵ = 1221251 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 1221283.

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 3 ways as a sum of consecutive naturals, for example, 87228 + ... + 87241.

It is an arithmetic number, because the mean of its divisors is an integer number (348940).

2^1221283 is an apocalyptic number.

1221283 is a deficient number, since it is larger than the sum of its proper divisors (174477).

1221283 is an equidigital number, since it uses as much as digits as its factorization.

1221283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174476.

The product of its digits is 192, while the sum is 19.

The square root of 1221283 is about 1105.1167359153. The cubic root of 1221283 is about 106.8904168223.

It can be divided in two parts, 1221 and 283, that multiplied together give a palindrome (345543).

The spelling of 1221283 in words is "one million, two hundred twenty-one thousand, two hundred eighty-three".