1256934064 has 10 divisors (see below), whose sum is σ = 2435309780. Its totient is φ = 628467024.

The previous prime is 1256934023. The next prime is 1256934103. The reversal of 1256934064 is 4604396521.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39279174 + ... + 39279205.

It is an arithmetic number, because the mean of its divisors is an integer number (243530978).

Almost surely, 2^1256934064 is an apocalyptic number.

It is an amenable number.

1256934064 is a deficient number, since it is larger than the sum of its proper divisors (1178375716).

1256934064 is an equidigital number, since it uses as much as digits as its factorization.

1256934064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78558387 (or 78558381 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 1256934064 is about 35453.2659144401. The cubic root of 1256934064 is about 1079.2055382694.

The spelling of 1256934064 in words is "one billion, two hundred fifty-six million, nine hundred thirty-four thousand, sixty-four".