1256875144 has 32 divisors (see below), whose sum is σ = 2851735680. Its totient is φ = 506974464.

The previous prime is 1256875141. The next prime is 1256875153. The reversal of 1256875144 is 4415786521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256875144.

It is not an unprimeable number, because it can be changed into a prime (1256875141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 659172 + ... + 661075.

It is an arithmetic number, because the mean of its divisors is an integer number (89116740).

Almost surely, 2^1256875144 is an apocalyptic number.

1256875144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1256875144 is an abundant number, since it is smaller than the sum of its proper divisors (1594860536).

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

1256875144 is a wasteful number, since it uses less digits than its factorization.

1256875144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320277 (or 1320273 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 1256875144 is about 35452.4349516363. The cubic root of 1256875144 is about 1079.1886750715.

The spelling of 1256875144 in words is "one billion, two hundred fifty-six million, eight hundred seventy-five thousand, one hundred forty-four".