10288021 has 4 divisors (see below), whose sum is σ = 10294444. Its totient is φ = 10281600.

The previous prime is 10287983. The next prime is 10288027. The reversal of 10288021 is 12088201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12088201 = 881 ⋅13721.

It can be written as a sum of positive squares in 2 ways, for example, as 8940100 + 1347921 = 2990^2 + 1161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10288021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10287983 and 10288001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10288027) 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, 1381 + ... + 4741.

It is an arithmetic number, because the mean of its divisors is an integer number (2573611).

Almost surely, 2^10288021 is an apocalyptic number.

It is an amenable number.

10288021 is a deficient number, since it is larger than the sum of its proper divisors (6423).

10288021 is an equidigital number, since it uses as much as digits as its factorization.

10288021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 10288021 is about 3207.4945050615. The cubic root of 10288021 is about 217.4923307288.

The spelling of 10288021 in words is "ten million, two hundred eighty-eight thousand, twenty-one".