1256265316 has 6 divisors (see below), whose sum is σ = 2198464310. Its totient is φ = 628132656.

The previous prime is 1256265301. The next prime is 1256265317. The reversal of 1256265316 is 6135626521.

It can be written as a sum of positive squares in only one way, i.e., 1221502500 + 34762816 = 34950^2 + 5896^2 .

It is not an unprimeable number, because it can be changed into a prime (1256265317) 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 as a sum of consecutive naturals, namely, 157033161 + ... + 157033168.

Almost surely, 2^1256265316 is an apocalyptic number.

It is an amenable number.

1256265316 is a deficient number, since it is larger than the sum of its proper divisors (942198994).

1256265316 is a wasteful number, since it uses less digits than its factorization.

1256265316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314066333 (or 314066331 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 1256265316 is about 35443.8332577051. The cubic root of 1256265316 is about 1079.0141082919.

The spelling of 1256265316 in words is "one billion, two hundred fifty-six million, two hundred sixty-five thousand, three hundred sixteen".