10266821 has 8 divisors (see below), whose sum is σ = 11038080. Its totient is φ = 9518688.

The previous prime is 10266799. The next prime is 10266833. The reversal of 10266821 is 12866201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10266821 is a prime.

It is a super-4 number, since 4×10266821⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10266721) 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, 4856 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (1379760).

Almost surely, 2^10266821 is an apocalyptic number.

It is an amenable number.

10266821 is a deficient number, since it is larger than the sum of its proper divisors (771259).

10266821 is a wasteful number, since it uses less digits than its factorization.

10266821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 10266821 is about 3204.1880406743. The cubic root of 10266821 is about 217.3428362132.

The spelling of 10266821 in words is "ten million, two hundred sixty-six thousand, eight hundred twenty-one".