1212255 has 48 divisors (see below), whose sum is σ = 2396160. Its totient is φ = 561600.

The previous prime is 1212251. The next prime is 1212259. The reversal of 1212255 is 5522121.

It is an interprime number because it is at equal distance from previous prime (1212251) and next prime (1212259).

It is not a de Polignac number, because 1212255 - 2² = 1212251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15306 + ... + 15384.

It is an arithmetic number, because the mean of its divisors is an integer number (49920).

2^1212255 is an apocalyptic number.

1212255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1212255 is a deficient number, since it is larger than the sum of its proper divisors (1183905).

1212255 is a wasteful number, since it uses less digits than its factorization.

1212255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 129 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 1212255 is about 1101.0245228877. The cubic root of 1212255 is about 106.6263790997.

Adding to 1212255 its reverse (5522121), we get a palindrome (6734376).

The spelling of 1212255 in words is "one million, two hundred twelve thousand, two hundred fifty-five".