1256263662 has 16 divisors (see below), whose sum is σ = 2570958720. Its totient is φ = 409015992.

The previous prime is 1256263661. The next prime is 1256263691. The reversal of 1256263662 is 2663626521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256263662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256263661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434362 + ... + 2434877.

It is an arithmetic number, because the mean of its divisors is an integer number (160684920).

Almost surely, 2^1256263662 is an apocalyptic number.

1256263662 is an abundant number, since it is smaller than the sum of its proper divisors (1314695058).

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

1256263662 is a wasteful number, since it uses less digits than its factorization.

1256263662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4869287.

The product of its digits is 155520, while the sum is 39.

The square root of 1256263662 is about 35443.8099250067. The cubic root of 1256263662 is about 1079.0136347481.

The spelling of 1256263662 in words is "one billion, two hundred fifty-six million, two hundred sixty-three thousand, six hundred sixty-two".