10821256 has 8 divisors (see below), whose sum is σ = 20289870. Its totient is φ = 5410624.

The previous prime is 10821229. The next prime is 10821257. The reversal of 10821256 is 65212801.

It can be written as a sum of positive squares in only one way, i.e., 8468100 + 2353156 = 2910^2 + 1534^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 10821256.

It is not an unprimeable number, because it can be changed into a prime (10821257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676321 + ... + 676336.

Almost surely, 2^10821256 is an apocalyptic number.

It is an amenable number.

10821256 is a deficient number, since it is larger than the sum of its proper divisors (9468614).

10821256 is a wasteful number, since it uses less digits than its factorization.

10821256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352663 (or 1352659 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 10821256 is about 3289.5677527602. The cubic root of 10821256 is about 221.1868092811.

The spelling of 10821256 in words is "ten million, eight hundred twenty-one thousand, two hundred fifty-six".