10730821 has 4 divisors (see below), whose sum is σ = 10860192. Its totient is φ = 10601452.

The previous prime is 10730761. The next prime is 10730873. The reversal of 10730821 is 12803701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12803701 = 19 ⋅673879.

It is a cyclic number.

It is not a de Polignac number, because 10730821 - 2¹⁵ = 10698053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10730792 and 10730801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10730891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64561 + ... + 64726.

It is an arithmetic number, because the mean of its divisors is an integer number (2715048).

Almost surely, 2^10730821 is an apocalyptic number.

It is an amenable number.

10730821 is a deficient number, since it is larger than the sum of its proper divisors (129371).

10730821 is an equidigital number, since it uses as much as digits as its factorization.

10730821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129370.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 10730821 is about 3275.7931863901. The cubic root of 10730821 is about 220.5689200663.

The spelling of 10730821 in words is "ten million, seven hundred thirty thousand, eight hundred twenty-one".