10281921 has 16 divisors (see below), whose sum is σ = 15274560. Its totient is φ = 6108480.

The previous prime is 10281913. The next prime is 10281937. The reversal of 10281921 is 12918201.

10281921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10281921 - 2³ = 10281913 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10281891 and 10281900.

It is not an unprimeable number, because it can be changed into a prime (10281911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3415 + ... + 5676.

It is an arithmetic number, because the mean of its divisors is an integer number (954660).

Almost surely, 2^10281921 is an apocalyptic number.

It is an amenable number.

10281921 is a deficient number, since it is larger than the sum of its proper divisors (4992639).

10281921 is a wasteful number, since it uses less digits than its factorization.

10281921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 10281921 is about 3206.5434661018. The cubic root of 10281921 is about 217.4493368588.

The spelling of 10281921 in words is "ten million, two hundred eighty-one thousand, nine hundred twenty-one".