1255221072 has 120 divisors (see below), whose sum is σ = 4024532096. Its totient is φ = 357758208.

The previous prime is 1255221059. The next prime is 1255221089. The reversal of 1255221072 is 2701225521.

1255221072 is a `hidden beast` number, since 1 + 2 + 552 + 2 + 107 + 2 = 666.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 489618 + ... + 492174.

Almost surely, 2^1255221072 is an apocalyptic number.

1255221072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255221072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012266048).

1255221072 is an abundant number, since it is smaller than the sum of its proper divisors (2769311024).

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

1255221072 is a wasteful number, since it uses less digits than its factorization.

1255221072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1255221072 is about 35429.0992264833. The cubic root of 1255221072 is about 1078.7150561901.

Adding to 1255221072 its reverse (2701225521), we get a palindrome (3956446593).

The spelling of 1255221072 in words is "one billion, two hundred fifty-five million, two hundred twenty-one thousand, seventy-two".