10366921 has 4 divisors (see below), whose sum is σ = 10376212. Its totient is φ = 10357632.

The previous prime is 10366903. The next prime is 10366969. The reversal of 10366921 is 12966301.

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: 12966301 = 3571 ⋅3631.

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 3920400 = 2539^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 10366921 - 2⁷ = 10366793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10366921.

It is not an unprimeable number, because it can be changed into a prime (10366981) 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, 2700 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (2594053).

Almost surely, 2^10366921 is an apocalyptic number.

It is an amenable number.

10366921 is a deficient number, since it is larger than the sum of its proper divisors (9291).

10366921 is an equidigital number, since it uses as much as digits as its factorization.

10366921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 10366921 is about 3219.7703334244. The cubic root of 10366921 is about 218.0469065521.

The spelling of 10366921 in words is "ten million, three hundred sixty-six thousand, nine hundred twenty-one".