1173220 has 12 divisors (see below), whose sum is σ = 2463804. Its totient is φ = 469280.

The previous prime is 1173199. The next prime is 1173223. The reversal of 1173220 is 223711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 937024 = 486^2 + 968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1173194 and 1173203.

It is not an unprimeable number, because it can be changed into a prime (1173223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29311 + ... + 29350.

It is an arithmetic number, because the mean of its divisors is an integer number (205317).

2^1173220 is an apocalyptic number.

1173220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1173220 is an abundant number, since it is smaller than the sum of its proper divisors (1290584).

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

1173220 is a wasteful number, since it uses less digits than its factorization.

1173220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58670 (or 58668 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1173220 is about 1083.1528054711. The cubic root of 1173220 is about 105.4694025657.

Adding to 1173220 its reverse (223711), we get a palindrome (1396931).

The spelling of 1173220 in words is "one million, one hundred seventy-three thousand, two hundred twenty".