10730021 has 2 divisors, whose sum is σ = 10730022. Its totient is φ = 10730020.

The previous prime is 10729993. The next prime is 10730023. The reversal of 10730021 is 12003701.

10730021 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9541921 + 1188100 = 3089^2 + 1090^2 .

It is an emirp because it is prime and its reverse (12003701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10730021 is a prime.

Together with 10730023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10729978 and 10730005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10730023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365010 + 5365011.

It is an arithmetic number, because the mean of its divisors is an integer number (5365011).

Almost surely, 2^10730021 is an apocalyptic number.

It is an amenable number.

10730021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10730021 is an equidigital number, since it uses as much as digits as its factorization.

10730021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 10730021 is about 3275.6710762835. The cubic root of 10730021 is about 220.5634386739.

Adding to 10730021 its reverse (12003701), we get a palindrome (22733722).

The spelling of 10730021 in words is "ten million, seven hundred thirty thousand, twenty-one".