1256000012 has 6 divisors (see below), whose sum is σ = 2198000028. Its totient is φ = 628000004.

The previous prime is 1256000003. The next prime is 1256000021. The reversal of 1256000012 is 2100006521.

It is an interprime number because it is at equal distance from previous prime (1256000003) and next prime (1256000021).

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 as a sum of consecutive naturals, namely, 156999998 + ... + 157000005.

It is an arithmetic number, because the mean of its divisors is an integer number (366333338).

Almost surely, 2^1256000012 is an apocalyptic number.

It is an amenable number.

1256000012 is a deficient number, since it is larger than the sum of its proper divisors (942000016).

1256000012 is a wasteful number, since it uses less digits than its factorization.

1256000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314000007 (or 314000005 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1256000012 is about 35440.0904626385. The cubic root of 1256000012 is about 1078.9381458580.

Adding to 1256000012 its reverse (2100006521), we get a palindrome (3356006533).

The spelling of 1256000012 in words is "one billion, two hundred fifty-six million, twelve", and thus it is an aban number.