1256326116 has 12 divisors (see below), whose sum is σ = 2931427632. Its totient is φ = 418775368.

The previous prime is 1256326111. The next prime is 1256326133. The reversal of 1256326116 is 6116236521.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1256326111) 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 3 ways as a sum of consecutive naturals, for example, 52346910 + ... + 52346933.

It is an arithmetic number, because the mean of its divisors is an integer number (244285636).

Almost surely, 2^1256326116 is an apocalyptic number.

It is an amenable number.

1256326116 is an abundant number, since it is smaller than the sum of its proper divisors (1675101516).

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

1256326116 is a wasteful number, since it uses less digits than its factorization.

1256326116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104693850 (or 104693848 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 1256326116 is about 35444.6909423682. The cubic root of 1256326116 is about 1079.0315151774.

The spelling of 1256326116 in words is "one billion, two hundred fifty-six million, three hundred twenty-six thousand, one hundred sixteen".