1220229 has 6 divisors (see below), whose sum is σ = 1762566. Its totient is φ = 813480.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220229 is 9220221.

It can be written as a sum of positive squares in only one way, i.e., 1004004 + 216225 = 1002^2 + 465^2 .

It is not a de Polignac number, because 1220229 - 2⁹ = 1219717 is a prime.

1220229 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67782 + ... + 67799.

It is an arithmetic number, because the mean of its divisors is an integer number (293761).

2^1220229 is an apocalyptic number.

It is an amenable number.

1220229 is a deficient number, since it is larger than the sum of its proper divisors (542337).

1220229 is a wasteful number, since it uses less digits than its factorization.

1220229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135587 (or 135584 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220229 is about 1104.6397602839. The cubic root of 1220229 is about 106.8596582061.

The spelling of 1220229 in words is "one million, two hundred twenty thousand, two hundred twenty-nine".