1212555255 has 16 divisors (see below), whose sum is σ = 1971894624. Its totient is φ = 636094080.

The previous prime is 1212555247. The next prime is 1212555259. The reversal of 1212555255 is 5525552121.

It is a happy number.

It is not a de Polignac number, because 1212555255 - 2³ = 1212555247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212555259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661684 + ... + 663513.

It is an arithmetic number, because the mean of its divisors is an integer number (123243414).

Almost surely, 2^1212555255 is an apocalyptic number.

1212555255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1212555255 is a deficient number, since it is larger than the sum of its proper divisors (759339369).

1212555255 is a wasteful number, since it uses less digits than its factorization.

1212555255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325266.

The product of its digits is 25000, while the sum is 33.

The square root of 1212555255 is about 34821.7640994824. The cubic root of 1212555255 is about 1066.3518155480.

The spelling of 1212555255 in words is "one billion, two hundred twelve million, five hundred fifty-five thousand, two hundred fifty-five".