1256256258 has 8 divisors (see below), whose sum is σ = 2512512528. Its totient is φ = 418752084.

The previous prime is 1256256257. The next prime is 1256256263. The reversal of 1256256258 is 8526526521.

It is a sphenic number, since it is the product of 3 distinct primes.

1256256258 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1256256257) 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, 104688016 + ... + 104688027.

It is an arithmetic number, because the mean of its divisors is an integer number (314064066).

Almost surely, 2^1256256258 is an apocalyptic number.

1256256258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1256256258 is a wasteful number, since it uses less digits than its factorization.

1256256258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209376048.

The product of its digits is 288000, while the sum is 42.

The square root of 1256256258 is about 35443.7054778419. The cubic root of 1256256258 is about 1079.0115149615.

The spelling of 1256256258 in words is "one billion, two hundred fifty-six million, two hundred fifty-six thousand, two hundred fifty-eight".