1256512 has 28 divisors (see below), whose sum is σ = 2583180. Its totient is φ = 605696.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256512 is 2156521.

It can be written as a sum of positive squares in 2 ways, for example, as 1048576 + 207936 = 1024^2 + 456^2 .

It is a super-2 number, since 2×1256512² = 3157644812288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518 + ... + 2194.

2^1256512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291590).

1256512 is an abundant number, since it is smaller than the sum of its proper divisors (1326668).

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

1256512 is an equidigital number, since it uses as much as digits as its factorization.

1256512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 708 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 1256512 is about 1120.9424606107. The cubic root of 1256512 is about 107.9084729811.

Subtracting 1256512 from its reverse (2156521), we obtain a palindrome (900009).

The spelling of 1256512 in words is "one million, two hundred fifty-six thousand, five hundred twelve".