1003001220 has 72 divisors (see below), whose sum is σ = 3276478296. Its totient is φ = 246892032.

The previous prime is 1003001213. The next prime is 1003001257. The reversal of 1003001220 is 221003001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26563716 + 976437504 = 5154^2 + 31248^2 .

It is a super-2 number, since 2×1003001220² = 2012022894642976800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211977 + ... + 216656.

It is an arithmetic number, because the mean of its divisors is an integer number (45506643).

Almost surely, 2^1003001220 is an apocalyptic number.

1003001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003001220 is an abundant number, since it is smaller than the sum of its proper divisors (2273477076).

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

1003001220 is a wasteful number, since it uses less digits than its factorization.

1003001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428661 (or 428656 counting only the distinct ones).

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

The square root of 1003001220 is about 31670.1945052442. The cubic root of 1003001220 is about 1000.9994075185. Note that the first 3 decimals are identical.

Adding to 1003001220 its reverse (221003001), we get a palindrome (1224004221).

The spelling of 1003001220 in words is "one billion, three million, one thousand, two hundred twenty".