1255887216 has 120 divisors (see below), whose sum is σ = 3730296960. Its totient is φ = 393579648.

The previous prime is 1255887211. The next prime is 1255887229. The reversal of 1255887216 is 6127885521.

1255887216 is a `hidden beast` number, since 1 + 2 + 558 + 87 + 2 + 16 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255887211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192195 + ... + 198621.

It is an arithmetic number, because the mean of its divisors is an integer number (31085808).

Almost surely, 2^1255887216 is an apocalyptic number.

1255887216 is a gapful number since it is divisible by the number (16) 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 1255887216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865148480).

1255887216 is an abundant number, since it is smaller than the sum of its proper divisors (2474409744).

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

1255887216 is a wasteful number, since it uses less digits than its factorization.

1255887216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523 (or 6514 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 1255887216 is about 35438.4990652821. The cubic root of 1255887216 is about 1078.9058466146.

The spelling of 1255887216 in words is "one billion, two hundred fifty-five million, eight hundred eighty-seven thousand, two hundred sixteen".