1256000064 has 56 divisors (see below), whose sum is σ = 3625279008. Its totient is φ = 380605440.

The previous prime is 1256000059. The next prime is 1256000089. The reversal of 1256000064 is 4600006521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1255999998 and 1256000043.

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, 295237 + ... + 299460.

Almost surely, 2^1256000064 is an apocalyptic number.

It is an amenable number.

1256000064 is an abundant number, since it is smaller than the sum of its proper divisors (2369278944).

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

1256000064 is a wasteful number, since it uses less digits than its factorization.

1256000064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594723 (or 594713 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1256000064 is about 35440.0911962709. The cubic root of 1256000064 is about 1078.9381607478.

Adding to 1256000064 its reverse (4600006521), we get a palindrome (5856006585).

The spelling of 1256000064 in words is "one billion, two hundred fifty-six million, sixty-four", and thus it is an aban number.