10388021 has 8 divisors (see below), whose sum is σ = 11995200. Its totient is φ = 8811648.

The previous prime is 10387997. The next prime is 10388023. The reversal of 10388021 is 12088301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10388021 - 2¹⁰ = 10386997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10388023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6971 + ... + 8328.

It is an arithmetic number, because the mean of its divisors is an integer number (1499400).

Almost surely, 2^10388021 is an apocalyptic number.

It is an amenable number.

10388021 is a deficient number, since it is larger than the sum of its proper divisors (1607179).

10388021 is an equidigital number, since it uses as much as digits as its factorization.

10388021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15403.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 10388021 is about 3223.0452990921. The cubic root of 10388021 is about 218.1947380344.

The spelling of 10388021 in words is "ten million, three hundred eighty-eight thousand, twenty-one".