1221030 has 24 divisors (see below), whose sum is σ = 3174912. Its totient is φ = 325584.

The previous prime is 1221029. The next prime is 1221049. The reversal of 1221030 is 301221.

1221030 = 551² + 552² + ... + 554².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6694 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (132288).

2^1221030 is an apocalyptic number.

1221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221030 is an abundant number, since it is smaller than the sum of its proper divisors (1953882).

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

1221030 is a wasteful number, since it uses less digits than its factorization.

1221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580 (or 13577 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1221030 is about 1105.0022624411. The cubic root of 1221030 is about 106.8830352018.

Adding to 1221030 its reverse (301221), we get a palindrome (1522251).

The spelling of 1221030 in words is "one million, two hundred twenty-one thousand, thirty".