1212355 has 12 divisors (see below), whose sum is σ = 1547280. Its totient is φ = 911744.

The previous prime is 1212347. The next prime is 1212361. The reversal of 1212355 is 5532121.

It is not a de Polignac number, because 1212355 - 2³ = 1212347 is a prime.

1212355 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1026 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (128940).

2^1212355 is an apocalyptic number.

1212355 is a deficient number, since it is larger than the sum of its proper divisors (334925).

1212355 is an equidigital number, since it uses as much as digits as its factorization.

1212355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 861 counting only the distinct ones).

The product of its digits is 300, while the sum is 19.

The square root of 1212355 is about 1101.0699342004. The cubic root of 1212355 is about 106.6293109209.

Adding to 1212355 its reverse (5532121), we get a palindrome (6744476).

The spelling of 1212355 in words is "one million, two hundred twelve thousand, three hundred fifty-five".