1201220 has 24 divisors (see below), whose sum is σ = 2671704. Its totient is φ = 452096.

The previous prime is 1201217. The next prime is 1201229. The reversal of 1201220 is 221021.

It can be written as a sum of positive squares in 4 ways, for example, as 430336 + 770884 = 656^2 + 878^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1201198 and 1201207.

It is not an unprimeable number, because it can be changed into a prime (1201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (111321).

2^1201220 is an apocalyptic number.

1201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201220 is an abundant number, since it is smaller than the sum of its proper divisors (1470484).

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

1201220 is a wasteful number, since it uses less digits than its factorization.

1201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1201220 is about 1096.0018248160. The cubic root of 1201220 is about 106.3018570392.

Adding to 1201220 its reverse (221021), we get a palindrome (1422241).

The spelling of 1201220 in words is "one million, two hundred one thousand, two hundred twenty".