10399281 has 16 divisors (see below), whose sum is σ = 14454720. Its totient is φ = 6644480.

The previous prime is 10399261. The next prime is 10399297. The reversal of 10399281 is 18299301.

It is a cyclic number.

It is not a de Polignac number, because 10399281 - 2⁶ = 10399217 is a prime.

It is a super-2 number, since 2×10399281² = 216290090633922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (10399201) 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 in 15 ways as a sum of consecutive naturals, for example, 6541 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (903420).

Almost surely, 2^10399281 is an apocalyptic number.

It is an amenable number.

10399281 is a deficient number, since it is larger than the sum of its proper divisors (4055439).

10399281 is a wasteful number, since it uses less digits than its factorization.

10399281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 10399281 is about 3224.7916211749. The cubic root of 10399281 is about 218.2735462945.

The spelling of 10399281 in words is "ten million, three hundred ninety-nine thousand, two hundred eighty-one".