10021256 has 16 divisors (see below), whose sum is σ = 21474240. Its totient is φ = 4294800.

The previous prime is 10021247. The next prime is 10021259. The reversal of 10021256 is 65212001.

It is not an unprimeable number, because it can be changed into a prime (10021259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89420 + ... + 89531.

It is an arithmetic number, because the mean of its divisors is an integer number (1342140).

Almost surely, 2^10021256 is an apocalyptic number.

It is an amenable number.

10021256 is an abundant number, since it is smaller than the sum of its proper divisors (11452984).

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

10021256 is a wasteful number, since it uses less digits than its factorization.

10021256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178964 (or 178960 counting only the distinct ones).

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

The square root of 10021256 is about 3165.6367447956. The cubic root of 10021256 is about 215.5960098531.

Adding to 10021256 its reverse (65212001), we get a palindrome (75233257).

The spelling of 10021256 in words is "ten million, twenty-one thousand, two hundred fifty-six".