10182721 has 6 divisors (see below), whose sum is σ = 10645250. Its totient is φ = 9739488.

The previous prime is 10182709. The next prime is 10182737. The reversal of 10182721 is 12728101.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 541696 = 3105^2 + 736^2 .

It is not a de Polignac number, because 10182721 - 2¹¹ = 10180673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10182692 and 10182701.

It is not an unprimeable number, because it can be changed into a prime (10182421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9096 + ... + 10153.

Almost surely, 2^10182721 is an apocalyptic number.

It is an amenable number.

10182721 is a deficient number, since it is larger than the sum of its proper divisors (462529).

10182721 is an equidigital number, since it uses as much as digits as its factorization.

10182721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19295 (or 19272 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 10182721 is about 3191.0376055446. The cubic root of 10182721 is about 216.7477584691.

The spelling of 10182721 in words is "ten million, one hundred eighty-two thousand, seven hundred twenty-one".