1212320 has 24 divisors (see below), whose sum is σ = 2864484. Its totient is φ = 484864.

The previous prime is 1212319. The next prime is 1212331. The reversal of 1212320 is 232121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 204304 = 1004^2 + 452^2 .

It is an unprimeable number.

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, 3629 + ... + 3948.

2^1212320 is an apocalyptic number.

1212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212320 is an abundant number, since it is smaller than the sum of its proper divisors (1652164).

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

1212320 is an equidigital number, since it uses as much as digits as its factorization.

1212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592 (or 7584 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1212320 is about 1101.0540404540. The cubic root of 1212320 is about 106.6282848018.

Adding to 1212320 its reverse (232121), we get a palindrome (1444441).

The spelling of 1212320 in words is "one million, two hundred twelve thousand, three hundred twenty".