27021256 has 8 divisors (see below), whose sum is σ = 50664870. Its totient is φ = 13510624.

The previous prime is 27021229. The next prime is 27021257. The reversal of 27021256 is 65212072.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 4268356 = 4770^2 + 2066^2 .

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 27021256.

It is not an unprimeable number, because it can be changed into a prime (27021257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1688821 + ... + 1688836.

Almost surely, 2^27021256 is an apocalyptic number.

It is an amenable number.

27021256 is a deficient number, since it is larger than the sum of its proper divisors (23643614).

27021256 is a wasteful number, since it uses less digits than its factorization.

27021256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377663 (or 3377659 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 27021256 is about 5198.1973798616. The cubic root of 27021256 is about 300.0787052757.

The spelling of 27021256 in words is "twenty-seven million, twenty-one thousand, two hundred fifty-six".