10021389 has 8 divisors (see below), whose sum is σ = 15270720. Its totient is φ = 5726496.

The previous prime is 10021357. The next prime is 10021393. The reversal of 10021389 is 98312001.

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

It is not a de Polignac number, because 10021389 - 2⁵ = 10021357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021289) 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, 238584 + ... + 238625.

It is an arithmetic number, because the mean of its divisors is an integer number (1908840).

Almost surely, 2^10021389 is an apocalyptic number.

It is an amenable number.

10021389 is a deficient number, since it is larger than the sum of its proper divisors (5249331).

10021389 is an equidigital number, since it uses as much as digits as its factorization.

10021389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477219.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 10021389 is about 3165.6577515581. The cubic root of 10021389 is about 215.5969636305.

The spelling of 10021389 in words is "ten million, twenty-one thousand, three hundred eighty-nine".