1256105488 has 40 divisors (see below), whose sum is σ = 2681274816. Its totient is φ = 565296000.

The previous prime is 1256105441. The next prime is 1256105491. The reversal of 1256105488 is 8845016521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256105488.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17556 + ... + 53107.

Almost surely, 2^1256105488 is an apocalyptic number.

It is an amenable number.

1256105488 is an abundant number, since it is smaller than the sum of its proper divisors (1425169328).

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

1256105488 is a wasteful number, since it uses less digits than its factorization.

1256105488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70783 (or 70777 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 1256105488 is about 35441.5785201506. The cubic root of 1256105488 is about 1078.9683472628.

The spelling of 1256105488 in words is "one billion, two hundred fifty-six million, one hundred five thousand, four hundred eighty-eight".