1256122316 has 18 divisors (see below), whose sum is σ = 2335129188. Its totient is φ = 591115840.

The previous prime is 1256122279. The next prime is 1256122337. The reversal of 1256122316 is 6132216521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 542150 + ... + 544461.

Almost surely, 2^1256122316 is an apocalyptic number.

It is an amenable number.

1256122316 is a deficient number, since it is larger than the sum of its proper divisors (1079006872).

1256122316 is a wasteful number, since it uses less digits than its factorization.

1256122316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086649 (or 1086630 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1256122316 is about 35441.8159241312. The cubic root of 1256122316 is about 1078.9731655414.

Adding to 1256122316 its reverse (6132216521), we get a palindrome (7388338837).

The spelling of 1256122316 in words is "one billion, two hundred fifty-six million, one hundred twenty-two thousand, three hundred sixteen".