1021256 has 8 divisors (see below), whose sum is σ = 1914870. Its totient is φ = 510624.

The previous prime is 1021253. The next prime is 1021259. The reversal of 1021256 is 6521201.

1021256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1021253) and next prime (1021259).

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 1156 = 1010^2 + 34^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1021253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63821 + ... + 63836.

2^1021256 is an apocalyptic number.

It is an amenable number.

1021256 is a deficient number, since it is larger than the sum of its proper divisors (893614).

1021256 is a wasteful number, since it uses less digits than its factorization.

1021256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127663 (or 127659 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1021256 is about 1010.5721151902. The cubic root of 1021256 is about 100.7035715942.

Adding to 1021256 its reverse (6521201), we get a palindrome (7542457).

Subtracting 1021256 from its reverse (6521201), we obtain a palindrome (5499945).

The spelling of 1021256 in words is "one million, twenty-one thousand, two hundred fifty-six".